diff --git a/adv-simd.h b/adv-simd.h
index 80f49bd3..df109ebe 100644
--- a/adv-simd.h
+++ b/adv-simd.h
@@ -112,7 +112,7 @@ inline size_t AdvancedProcessBlocks64_6x2_NEON(F2 func2, F6 func6,
     CRYPTOPP_ASSERT(outBlocks);
     CRYPTOPP_ASSERT(length >= 8);
 
-#if defined(CRYPTOPP_LITTLE_ENDIAN)
+#if (CRYPTOPP_LITTLE_ENDIAN)
     const uint32x4_t s_one = {0, 0, 0, 1<<24};
     const uint32x4_t s_two = {0, 2<<24, 0, 2<<24};
 #else
@@ -357,7 +357,7 @@ inline size_t AdvancedProcessBlocks128_6x1_NEON(F1 func1, F6 func6,
     CRYPTOPP_ASSERT(outBlocks);
     CRYPTOPP_ASSERT(length >= 16);
 
-#if defined(CRYPTOPP_LITTLE_ENDIAN)
+#if (CRYPTOPP_LITTLE_ENDIAN)
     const uint32x4_t s_one = {0, 0, 0, 1<<24};
     const uint32x4_t s_two = {0, 2<<24, 0, 2<<24};
 #else
@@ -520,7 +520,7 @@ inline size_t AdvancedProcessBlocks128_4x1_NEON(F1 func1, F4 func4,
     CRYPTOPP_ASSERT(length >= 16);
     CRYPTOPP_UNUSED(unused);
 
-#if defined(CRYPTOPP_LITTLE_ENDIAN)
+#if (CRYPTOPP_LITTLE_ENDIAN)
     const uint32x4_t s_one = {0, 0, 0, 1<<24};
     const uint32x4_t s_two = {0, 2<<24, 0, 2<<24};
 #else
@@ -660,7 +660,7 @@ inline size_t AdvancedProcessBlocks128_6x2_NEON(F2 func2, F6 func6,
     CRYPTOPP_ASSERT(outBlocks);
     CRYPTOPP_ASSERT(length >= 16);
 
-#if defined(CRYPTOPP_LITTLE_ENDIAN)
+#if (CRYPTOPP_LITTLE_ENDIAN)
     const uint32x4_t s_one = {0, 0, 0, 1<<24};
     const uint32x4_t s_two = {0, 2<<24, 0, 2<<24};
 #else
@@ -1806,7 +1806,7 @@ inline size_t AdvancedProcessBlocks64_6x2_ALTIVEC(F2 func2, F6 func6,
     CRYPTOPP_ASSERT(outBlocks);
     CRYPTOPP_ASSERT(length >= 8);
 
-#if defined(CRYPTOPP_LITTLE_ENDIAN)
+#if (CRYPTOPP_LITTLE_ENDIAN)
     enum {LowOffset=8, HighOffset=0};
     const uint32x4_p s_one  = {1,0,0,0};
     const uint32x4_p s_two  = {2,0,2,0};
@@ -2077,7 +2077,7 @@ inline size_t AdvancedProcessBlocks128_4x1_ALTIVEC(F1 func1, F4 func4,
     CRYPTOPP_ASSERT(outBlocks);
     CRYPTOPP_ASSERT(length >= 16);
 
-#if defined(CRYPTOPP_LITTLE_ENDIAN)
+#if (CRYPTOPP_LITTLE_ENDIAN)
     const uint32x4_p s_one  = {1,0,0,0};
 #else
     const uint32x4_p s_one = {0,0,0,1};
@@ -2222,7 +2222,7 @@ inline size_t AdvancedProcessBlocks128_6x1_ALTIVEC(F1 func1, F6 func6,
     CRYPTOPP_ASSERT(outBlocks);
     CRYPTOPP_ASSERT(length >= 16);
 
-#if defined(CRYPTOPP_LITTLE_ENDIAN)
+#if (CRYPTOPP_LITTLE_ENDIAN)
     const uint32x4_p s_one  = {1,0,0,0};
 #else
     const uint32x4_p s_one = {0,0,0,1};
diff --git a/aria.cpp b/aria.cpp
index 6e59d0ff..3b848109 100644
--- a/aria.cpp
+++ b/aria.cpp
@@ -291,7 +291,7 @@ void ARIA::Base::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, b
 	else
 #endif  // CRYPTOPP_ENABLE_ARIA_SSSE3_INTRINSICS
 
-#ifdef CRYPTOPP_LITTLE_ENDIAN
+#if (CRYPTOPP_LITTLE_ENDIAN)
 	{
 		outBlock[ 0] = (byte)(X1[ARIA_BRF(t[0],3)]   ) ^ rk[ 3];
 		outBlock[ 1] = (byte)(X2[ARIA_BRF(t[0],2)]>>8) ^ rk[ 2];
diff --git a/camellia.cpp b/camellia.cpp
index 07bd38da..30b8bc99 100644
--- a/camellia.cpp
+++ b/camellia.cpp
@@ -60,7 +60,7 @@ NAMESPACE_BEGIN(CryptoPP)
 	ROUND(lh, ll, rh, rl, k0, k1)						\
 	ROUND(rh, rl, lh, ll, k2, k3)
 
-#ifdef CRYPTOPP_LITTLE_ENDIAN
+#if (CRYPTOPP_LITTLE_ENDIAN)
 #define EFI(i) (1-(i))
 #else
 #define EFI(i) (i)
diff --git a/config.h b/config.h
index 75bbdc72..65131315 100644
--- a/config.h
+++ b/config.h
@@ -9,23 +9,24 @@
 // ***************** Important Settings ********************
 
 // define this if running on a big-endian CPU
+// big endian will be assumed if CRYPTOPP_LITTLE_ENDIAN is not non-0
 #if !defined(CRYPTOPP_LITTLE_ENDIAN) && !defined(CRYPTOPP_BIG_ENDIAN) && (defined(__BIG_ENDIAN__) || (defined(__s390__) || defined(__s390x__) || defined(__zarch__)) || (defined(__m68k__) || defined(__MC68K__)) || defined(__sparc) || defined(__sparc__) || defined(__hppa__) || defined(__MIPSEB__) || defined(__ARMEB__) || (defined(__MWERKS__) && !defined(__INTEL__)))
 #	define CRYPTOPP_BIG_ENDIAN 1
 #endif
 
 // define this if running on a little-endian CPU
-// big endian will be assumed if CRYPTOPP_LITTLE_ENDIAN is not defined
+// big endian will be assumed if CRYPTOPP_LITTLE_ENDIAN is not non-0
 #if !defined(CRYPTOPP_BIG_ENDIAN) && !defined(CRYPTOPP_LITTLE_ENDIAN)
 #	define CRYPTOPP_LITTLE_ENDIAN 1
 #endif
 
 // Sanity checks. Some processors have more than big, little and bi-endian modes. PDP mode, where order results in "4312", should
 // raise red flags immediately. Additionally, mis-classified machines, like (previosuly) S/390, should raise red flags immediately.
-#if defined(CRYPTOPP_BIG_ENDIAN) && defined(__GNUC__) && defined(__BYTE_ORDER__) && (__BYTE_ORDER__ != __ORDER_BIG_ENDIAN__)
-# error "CRYPTOPP_BIG_ENDIAN is set, but __BYTE_ORDER__ is not __ORDER_BIG_ENDIAN__"
+#if (CRYPTOPP_BIG_ENDIAN) && defined(__GNUC__) && defined(__BYTE_ORDER__) && (__BYTE_ORDER__ != __ORDER_BIG_ENDIAN__)
+# error "(CRYPTOPP_BIG_ENDIAN) is set, but __BYTE_ORDER__ is not __ORDER_BIG_ENDIAN__"
 #endif
-#if defined(CRYPTOPP_LITTLE_ENDIAN) && defined(__GNUC__) && defined(__BYTE_ORDER__) && (__BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__)
-# error "CRYPTOPP_LITTLE_ENDIAN is set, but __BYTE_ORDER__ is not __ORDER_LITTLE_ENDIAN__"
+#if (CRYPTOPP_LITTLE_ENDIAN) && defined(__GNUC__) && defined(__BYTE_ORDER__) && (__BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__)
+# error "(CRYPTOPP_LITTLE_ENDIAN) is set, but __BYTE_ORDER__ is not __ORDER_LITTLE_ENDIAN__"
 #endif
 
 // Define this if you want to disable all OS-dependent features,
@@ -606,7 +607,7 @@ NAMESPACE_END
 
 // We don't have an ARM big endian test rig. Disable
 // ARM-BE ASM and instrinsics until we can test it.
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
 # define CRYPTOPP_DISABLE_ASM 1
 #endif
 
diff --git a/crc.cpp b/crc.cpp
index 6922df45..854886c2 100644
--- a/crc.cpp
+++ b/crc.cpp
@@ -21,7 +21,7 @@ extern void CRC32C_Update_SSE42(const byte *s, size_t n, word32& c);
 
 /* Table of CRC-32's of all single byte values (made by makecrc.c) */
 const word32 CRC32::m_tab[] = {
-#ifdef CRYPTOPP_LITTLE_ENDIAN
+#if (CRYPTOPP_LITTLE_ENDIAN)
 	0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
 	0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
 	0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
@@ -189,7 +189,7 @@ void CRC32::TruncatedFinal(byte *hash, size_t size)
 // Castagnoli CRC32C (iSCSI)
 
 const word32 CRC32C::m_tab[] = {
-#ifdef CRYPTOPP_LITTLE_ENDIAN
+#if (CRYPTOPP_LITTLE_ENDIAN)
     0x00000000L, 0xf26b8303L, 0xe13b70f7L, 0x1350f3f4L, 0xc79a971fL,
     0x35f1141cL, 0x26a1e7e8L, 0xd4ca64ebL, 0x8ad958cfL, 0x78b2dbccL,
     0x6be22838L, 0x9989ab3bL, 0x4d43cfd0L, 0xbf284cd3L, 0xac78bf27L,
diff --git a/crc.h b/crc.h
index 006313e1..02332e4b 100644
--- a/crc.h
+++ b/crc.h
@@ -12,7 +12,7 @@ NAMESPACE_BEGIN(CryptoPP)
 
 const word32 CRC32_NEGL = 0xffffffffL;
 
-#ifdef CRYPTOPP_LITTLE_ENDIAN
+#if (CRYPTOPP_LITTLE_ENDIAN)
 #define CRC32_INDEX(c) (c & 0xff)
 #define CRC32_SHIFTED(c) (c >> 8)
 #else
diff --git a/gcm-simd.cpp b/gcm-simd.cpp
index 46afb17b..16ab1a43 100644
--- a/gcm-simd.cpp
+++ b/gcm-simd.cpp
@@ -191,7 +191,7 @@ using CryptoPP::VectorRotateLeft;
 
 inline uint64x2_p VMULL2LE(const uint64x2_p& val)
 {
-#if CRYPTOPP_BIG_ENDIAN
+#if (CRYPTOPP_BIG_ENDIAN)
     return VectorRotateLeft<8>(val);
 #else
     return val;
@@ -776,7 +776,7 @@ inline uint64x2_p GCM_Multiply_VMULL(uint64x2_p x, uint64x2_p h, uint64x2_p r)
 
 inline uint64x2_p LoadHashKey(const byte *hashKey)
 {
-#if CRYPTOPP_BIG_ENDIAN
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint64x2_p key = (uint64x2_p)VectorLoad(hashKey);
     const uint8x16_p mask = {8,9,10,11, 12,13,14,15, 0,1,2,3, 4,5,6,7};
     return vec_perm(key, key, mask);
@@ -825,7 +825,7 @@ inline T SwapWords(const T& data)
 
 inline uint64x2_p LoadBuffer1(const byte *dataBuffer)
 {
-#if CRYPTOPP_BIG_ENDIAN
+#if (CRYPTOPP_BIG_ENDIAN)
     return (uint64x2_p)VectorLoad(dataBuffer);
 #else
     const uint64x2_p data = (uint64x2_p)VectorLoad(dataBuffer);
@@ -836,7 +836,7 @@ inline uint64x2_p LoadBuffer1(const byte *dataBuffer)
 
 inline uint64x2_p LoadBuffer2(const byte *dataBuffer)
 {
-#if CRYPTOPP_BIG_ENDIAN
+#if (CRYPTOPP_BIG_ENDIAN)
     return (uint64x2_p)SwapWords(VectorLoadBE(dataBuffer));
 #else
     return (uint64x2_p)VectorLoadBE(dataBuffer);
diff --git a/gcm.cpp b/gcm.cpp
index 84129b56..59236ac2 100644
--- a/gcm.cpp
+++ b/gcm.cpp
@@ -438,7 +438,7 @@ size_t GCM_Base::AuthenticateBlocks(const byte *data, size_t len)
 
             #define READ_TABLE_WORD64_COMMON(a, b, c, d)    *(word64 *)(void *)(mulTable+(a*1024)+(b*256)+c+d*8)
 
-            #ifdef CRYPTOPP_LITTLE_ENDIAN
+            #if (CRYPTOPP_LITTLE_ENDIAN)
                 #if CRYPTOPP_BOOL_SLOW_WORD64
                     word32 z0 = (word32)x0;
                     word32 z1 = (word32)(x0>>32);
@@ -509,7 +509,7 @@ size_t GCM_Base::AuthenticateBlocks(const byte *data, size_t len)
 
             #define READ_TABLE_WORD64_COMMON(a, c, d)    *(word64 *)(void *)(mulTable+(a)*256*16+(c)+(d)*8)
 
-            #ifdef CRYPTOPP_LITTLE_ENDIAN
+            #if (CRYPTOPP_LITTLE_ENDIAN)
                 #if CRYPTOPP_BOOL_SLOW_WORD64
                     word32 z0 = (word32)x0;
                     word32 z1 = (word32)(x0>>32);
diff --git a/integer.cpp b/integer.cpp
index ff807547..58665ddd 100644
--- a/integer.cpp
+++ b/integer.cpp
@@ -285,7 +285,7 @@ public:
 #endif
 	{
 #if defined(CRYPTOPP_NATIVE_DWORD_AVAILABLE)
-#  if defined(CRYPTOPP_LITTLE_ENDIAN)
+#  if (CRYPTOPP_LITTLE_ENDIAN)
 		const word t[2] = {low,high};
 		memcpy(&m_whole, t, sizeof(m_whole));
 #  else
@@ -390,7 +390,7 @@ private:
 	//   Thanks to Martin Bonner at http://stackoverflow.com/a/39507183
     struct half_words
     {
-    #ifdef CRYPTOPP_LITTLE_ENDIAN
+    #if (CRYPTOPP_LITTLE_ENDIAN)
         word low;
         word high;
     #else
diff --git a/kalyna.cpp b/kalyna.cpp
index 18d6e2c0..6cff5cd0 100644
--- a/kalyna.cpp
+++ b/kalyna.cpp
@@ -43,7 +43,7 @@ using CryptoPP::KalynaTab::IS;
 template <unsigned int NB>
 inline void MakeOddKey(const word64 evenkey[NB], word64 oddkey[NB])
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     if (NB == 2)
     {
         oddkey[0] = (evenkey[1] << 8) | (evenkey[0] >> 56);
diff --git a/lea-simd.cpp b/lea-simd.cpp
index c7eaa819..e8af1ded 100644
--- a/lea-simd.cpp
+++ b/lea-simd.cpp
@@ -107,7 +107,7 @@ inline uint32x4_t RotateRight(const uint32x4_t& val)
 template <>
 inline uint32x4_t RotateLeft<8>(const uint32x4_t& val)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8_t maskb[16] = { 14,13,12,15, 10,9,8,11, 6,5,4,7, 2,1,0,3 };
     const uint8x16_t mask = vld1q_u8(maskb);
 #else
@@ -122,7 +122,7 @@ inline uint32x4_t RotateLeft<8>(const uint32x4_t& val)
 template <>
 inline uint32x4_t RotateRight<8>(const uint32x4_t& val)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8_t maskb[16] = { 12,15,14,13, 8,11,10,9, 4,7,6,5, 0,3,2,1 };
     const uint8x16_t mask = vld1q_u8(maskb);
 #else
diff --git a/misc.h b/misc.h
index e6ef4d05..086f76ed 100644
--- a/misc.h
+++ b/misc.h
@@ -1094,9 +1094,9 @@ inline bool IsAligned(const void *ptr)
 	return IsAlignedOn(ptr, GetAlignmentOf<T>());
 }
 
-#if defined(CRYPTOPP_LITTLE_ENDIAN)
+#if (CRYPTOPP_LITTLE_ENDIAN)
 	typedef LittleEndian NativeByteOrder;
-#elif defined(CRYPTOPP_BIG_ENDIAN)
+#elif (CRYPTOPP_BIG_ENDIAN)
 	typedef BigEndian NativeByteOrder;
 #else
 # error "Unable to determine endian-ness"
@@ -1107,7 +1107,7 @@ inline bool IsAligned(const void *ptr)
 ///   native byte order is big-endian
 /// \details NativeByteOrder is a typedef depending on the platform. If CRYPTOPP_LITTLE_ENDIAN is
 ///   set in config.h, then GetNativeByteOrder returns LittleEndian. If
-///   CRYPTOPP_BIG_ENDIAN is set, then GetNativeByteOrder returns BigEndian.
+///   (CRYPTOPP_BIG_ENDIAN) is set, then GetNativeByteOrder returns BigEndian.
 /// \note There are other byte orders besides little- and big-endian, and they include bi-endian
 ///   and PDP-endian. If a system is neither little-endian nor big-endian, then a compile time
 ///   error occurs.
diff --git a/ppc-simd.h b/ppc-simd.h
index b8213f89..7da9886c 100644
--- a/ppc-simd.h
+++ b/ppc-simd.h
@@ -218,7 +218,7 @@ inline T VectorShiftLeft(const T& vec)
     }
     else
     {
-#if CRYPTOPP_BIG_ENDIAN
+#if (CRYPTOPP_BIG_ENDIAN)
     return (T)vec_sld((uint8x16_p)vec, (uint8x16_p)zero, C);
 #else
     return (T)vec_sld((uint8x16_p)zero, (uint8x16_p)vec, 16-C);
@@ -261,7 +261,7 @@ inline T VectorShiftRight(const T& vec)
     }
     else
     {
-#if CRYPTOPP_BIG_ENDIAN
+#if (CRYPTOPP_BIG_ENDIAN)
     return (T)vec_sld((uint8x16_p)zero, (uint8x16_p)vec, 16-C);
 #else
     return (T)vec_sld((uint8x16_p)vec, (uint8x16_p)zero, C);
@@ -284,7 +284,7 @@ template <unsigned int C, class T>
 inline T VectorRotateLeft(const T& vec)
 {
     enum { R = C&0xf };
-#if CRYPTOPP_BIG_ENDIAN
+#if (CRYPTOPP_BIG_ENDIAN)
     return (T)vec_sld((uint8x16_p)vec, (uint8x16_p)vec, R);
 #else
     return (T)vec_sld((uint8x16_p)vec, (uint8x16_p)vec, 16-R);
@@ -306,7 +306,7 @@ template <unsigned int C, class T>
 inline T VectorRotateRight(const T& vec)
 {
     enum { R = C&0xf };
-#if CRYPTOPP_BIG_ENDIAN
+#if (CRYPTOPP_BIG_ENDIAN)
     return (T)vec_sld((uint8x16_p)vec, (uint8x16_p)vec, 16-R);
 #else
     return (T)vec_sld((uint8x16_p)vec, (uint8x16_p)vec, R);
@@ -399,7 +399,7 @@ inline uint32x4_p VectorLoadBE(const byte src[16])
 #if defined(CRYPTOPP_XLC_VERSION)
     return (uint32x4_p)vec_xl_be(0, (byte*)src);
 #else
-# if defined(CRYPTOPP_BIG_ENDIAN)
+# if (CRYPTOPP_BIG_ENDIAN)
     return (uint32x4_p)vec_vsx_ld(0, src);
 # else
     return (uint32x4_p)Reverse(vec_vsx_ld(0, src));
@@ -420,7 +420,7 @@ inline uint32x4_p VectorLoadBE(int off, const byte src[16])
 #if defined(CRYPTOPP_XLC_VERSION)
     return (uint32x4_p)vec_xl_be(off, (byte*)src);
 #else
-# if defined(CRYPTOPP_BIG_ENDIAN)
+# if (CRYPTOPP_BIG_ENDIAN)
     return (uint32x4_p)vec_vsx_ld(off, (byte*)src);
 # else
     return (uint32x4_p)Reverse(vec_vsx_ld(off, (byte*)src));
@@ -497,7 +497,7 @@ inline void VectorStoreBE(const T& src, byte dest[16])
 #if defined(CRYPTOPP_XLC_VERSION)
     vec_xst_be((uint8x16_p)src, 0, (byte*)dest);
 #else
-# if defined(CRYPTOPP_BIG_ENDIAN)
+# if (CRYPTOPP_BIG_ENDIAN)
     vec_vsx_st((uint8x16_p)src, 0, (byte*)dest);
 # else
     vec_vsx_st((uint8x16_p)Reverse(src), 0, (byte*)dest);
@@ -521,7 +521,7 @@ inline void VectorStoreBE(const T& src, int off, byte dest[16])
 #if defined(CRYPTOPP_XLC_VERSION)
     vec_xst_be((uint8x16_p)src, off, (byte*)dest);
 #else
-# if defined(CRYPTOPP_BIG_ENDIAN)
+# if (CRYPTOPP_BIG_ENDIAN)
     vec_vsx_st((uint8x16_p)src, off, (byte*)dest);
 # else
     vec_vsx_st((uint8x16_p)Reverse(src), off, (byte*)dest);
@@ -660,7 +660,7 @@ inline uint32x4_p VectorLoad(int off, const word32 src[4])
 /// \since Crypto++ 6.0
 inline uint32x4_p VectorLoadBE(const byte src[16])
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     return (uint32x4_p)VectorLoad(src);
 #else
     return (uint32x4_p)Reverse(VectorLoad(src));
@@ -701,7 +701,7 @@ inline void VectorStore(const T& data, byte dest[16])
 template <class T>
 inline void VectorStoreBE(const T& src, byte dest[16])
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     VectorStore(src, dest);
 #else
     VectorStore(Reverse(src), dest);
diff --git a/rijndael-simd.cpp b/rijndael-simd.cpp
index 26228f1d..b957d971 100644
--- a/rijndael-simd.cpp
+++ b/rijndael-simd.cpp
@@ -841,7 +841,7 @@ void Rijndael_UncheckedSetKey_POWER8(const byte* userKey, size_t keyLen, word32*
         rkey += keyLen/4;
     }
 
-#if defined(CRYPTOPP_LITTLE_ENDIAN)
+#if (CRYPTOPP_LITTLE_ENDIAN)
     rkey = rk;
     const uint8x16_p mask = ((uint8x16_p){12,13,14,15, 8,9,10,11, 4,5,6,7, 0,1,2,3});
     const uint8x16_p zero = {0};
diff --git a/rijndael.cpp b/rijndael.cpp
index f0e200fb..76d91e63 100644
--- a/rijndael.cpp
+++ b/rijndael.cpp
@@ -203,7 +203,7 @@ ANONYMOUS_NAMESPACE_END
 #define QUARTER_ROUND_E(t, a, b, c, d)		QUARTER_ROUND(TL_M, Te, t, a, b, c, d)
 #define QUARTER_ROUND_D(t, a, b, c, d)		QUARTER_ROUND(TL_M, Td, t, a, b, c, d)
 
-#ifdef CRYPTOPP_LITTLE_ENDIAN
+#if (CRYPTOPP_LITTLE_ENDIAN)
 	#define QUARTER_ROUND_FE(t, a, b, c, d)		QUARTER_ROUND(TL_F, Te, t, d, c, b, a)
 	#define QUARTER_ROUND_FD(t, a, b, c, d)		QUARTER_ROUND(TL_F, Td, t, d, c, b, a)
 	#if defined(CRYPTOPP_ALLOW_RIJNDAEL_UNALIGNED_DATA_ACCESS)
diff --git a/sha-simd.cpp b/sha-simd.cpp
index e699fbe4..687fe169 100644
--- a/sha-simd.cpp
+++ b/sha-simd.cpp
@@ -1115,7 +1115,7 @@ void VectorStore32x4u(const uint32x4_p8 val, T* data, int offset)
 template <class T> static inline
 uint32x4_p8 VectorLoadMsg32x4(const T* data, int offset)
 {
-#if defined(CRYPTOPP_LITTLE_ENDIAN)
+#if (CRYPTOPP_LITTLE_ENDIAN)
     const uint8x16_p8 mask = {3,2,1,0, 7,6,5,4, 11,10,9,8, 15,14,13,12};
     const uint32x4_p8 r = VectorLoad32x4u(data, offset);
     return (uint32x4_p8)vec_perm(r, r, mask);
@@ -1190,7 +1190,7 @@ uint32x4_p8 VectorPack(const uint32x4_p8 a, const uint32x4_p8 b,
 template <unsigned int L> static inline
 uint32x4_p8 VectorShiftLeft(const uint32x4_p8 val)
 {
-#if defined(CRYPTOPP_LITTLE_ENDIAN)
+#if (CRYPTOPP_LITTLE_ENDIAN)
     return (uint32x4_p8)vec_sld((uint8x16_p8)val, (uint8x16_p8)val, (16-L)&0xf);
 #else
     return (uint32x4_p8)vec_sld((uint8x16_p8)val, (uint8x16_p8)val, L&0xf);
@@ -1409,7 +1409,7 @@ void VectorStore64x2u(const uint64x2_p8 val, T* data, int offset)
 template <class T> static inline
 uint64x2_p8 VectorLoadMsg64x2(const T* data, int offset)
 {
-#if defined(CRYPTOPP_LITTLE_ENDIAN)
+#if (CRYPTOPP_LITTLE_ENDIAN)
     const uint8x16_p8 mask = {0,1,2,3, 4,5,6,7, 8,9,10,11, 12,13,14,15};
     return VectorPermute64x2(VectorLoad64x2u(data, offset), mask);
 #else
@@ -1481,7 +1481,7 @@ uint64x2_p8 VectorPack(const uint64x2_p8 x, const uint64x2_p8 y)
 template <unsigned int L> static inline
 uint64x2_p8 VectorShiftLeft(const uint64x2_p8 val)
 {
-#if defined(CRYPTOPP_LITTLE_ENDIAN)
+#if (CRYPTOPP_LITTLE_ENDIAN)
     return (uint64x2_p8)vec_sld((uint8x16_p8)val, (uint8x16_p8)val, (16-L)&0xf);
 #else
     return (uint64x2_p8)vec_sld((uint8x16_p8)val, (uint8x16_p8)val, L&0xf);
diff --git a/shark.cpp b/shark.cpp
index a8c304eb..6e3b8da3 100644
--- a/shark.cpp
+++ b/shark.cpp
@@ -67,7 +67,7 @@ void SHARK::Base::UncheckedSetKey(const byte *key, unsigned int keyLen, const Na
 			m_roundKeys[i] = SHARKTransform(m_roundKeys[i]);
 	}
 
-#ifdef CRYPTOPP_LITTLE_ENDIAN
+#if (CRYPTOPP_LITTLE_ENDIAN)
 	m_roundKeys[0] = ByteReverse(m_roundKeys[0]);
 	m_roundKeys[m_rounds] = ByteReverse(m_roundKeys[m_rounds]);
 #endif
@@ -84,7 +84,7 @@ void SHARK::Enc::InitForKeySetup()
 
 	m_roundKeys[DEFAULT_ROUNDS] = SHARKTransform(cbox[0][DEFAULT_ROUNDS]);
 
-#ifdef CRYPTOPP_LITTLE_ENDIAN
+#if (CRYPTOPP_LITTLE_ENDIAN)
 	m_roundKeys[0] = ByteReverse(m_roundKeys[0]);
 	m_roundKeys[m_rounds] = ByteReverse(m_roundKeys[m_rounds]);
 #endif
diff --git a/simon128-simd.cpp b/simon128-simd.cpp
index 5d5af659..21af1d40 100644
--- a/simon128-simd.cpp
+++ b/simon128-simd.cpp
@@ -99,7 +99,7 @@ inline uint64x2_t RotateRight64(const uint64x2_t& val)
 template <>
 inline uint64x2_t RotateLeft64<8>(const uint64x2_t& val)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8_t maskb[16] = { 14,13,12,11, 10,9,8,15, 6,5,4,3, 2,1,0,7 };
     const uint8x16_t mask = vld1q_u8(maskb);
 #else
@@ -115,7 +115,7 @@ inline uint64x2_t RotateLeft64<8>(const uint64x2_t& val)
 template <>
 inline uint64x2_t RotateRight64<8>(const uint64x2_t& val)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8_t maskb[16] = { 8,15,14,13, 12,11,10,9, 0,7,6,5, 4,3,2,1 };
     const uint8x16_t mask = vld1q_u8(maskb);
 #else
@@ -567,7 +567,7 @@ inline uint64x2_p SIMON128_f(const uint64x2_p val)
 
 inline void SIMON128_Enc_Block(uint32x4_p &block, const word64 *subkeys, unsigned int rounds)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m1 = {31,30,29,28,27,26,25,24, 15,14,13,12,11,10,9,8};
     const uint8x16_p m2 = {23,22,21,20,19,18,17,16, 7,6,5,4,3,2,1,0};
 #else
@@ -595,7 +595,7 @@ inline void SIMON128_Enc_Block(uint32x4_p &block, const word64 *subkeys, unsigne
         std::swap(x1, y1);
     }
 
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m3 = {31,30,29,28,27,26,25,24, 15,14,13,12,11,10,9,8};
     //const uint8x16_p m4 = {23,22,21,20,19,18,17,16, 7,6,5,4,3,2,1,0};
 #else
@@ -609,7 +609,7 @@ inline void SIMON128_Enc_Block(uint32x4_p &block, const word64 *subkeys, unsigne
 
 inline void SIMON128_Dec_Block(uint32x4_p &block, const word64 *subkeys, unsigned int rounds)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m1 = {31,30,29,28,27,26,25,24, 15,14,13,12,11,10,9,8};
     const uint8x16_p m2 = {23,22,21,20,19,18,17,16, 7,6,5,4,3,2,1,0};
 #else
@@ -638,7 +638,7 @@ inline void SIMON128_Dec_Block(uint32x4_p &block, const word64 *subkeys, unsigne
         y1 = VectorXor(VectorXor(y1, SIMON128_f(x1)), rk2);
     }
 
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m3 = {31,30,29,28,27,26,25,24, 15,14,13,12,11,10,9,8};
     //const uint8x16_p m4 = {23,22,21,20,19,18,17,16, 7,6,5,4,3,2,1,0};
 #else
@@ -654,7 +654,7 @@ inline void SIMON128_Enc_6_Blocks(uint32x4_p &block0, uint32x4_p &block1,
             uint32x4_p &block2, uint32x4_p &block3, uint32x4_p &block4,
             uint32x4_p &block5, const word64 *subkeys, unsigned int rounds)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m1 = {31,30,29,28,27,26,25,24, 15,14,13,12,11,10,9,8};
     const uint8x16_p m2 = {23,22,21,20,19,18,17,16, 7,6,5,4,3,2,1,0};
 #else
@@ -692,7 +692,7 @@ inline void SIMON128_Enc_6_Blocks(uint32x4_p &block0, uint32x4_p &block1,
         std::swap(x1, y1); std::swap(x2, y2); std::swap(x3, y3);
     }
 
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m3 = {31,30,29,28,27,26,25,24, 15,14,13,12,11,10,9,8};
     const uint8x16_p m4 = {23,22,21,20,19,18,17,16, 7,6,5,4,3,2,1,0};
 #else
@@ -713,7 +713,7 @@ inline void SIMON128_Dec_6_Blocks(uint32x4_p &block0, uint32x4_p &block1,
             uint32x4_p &block2, uint32x4_p &block3, uint32x4_p &block4,
             uint32x4_p &block5, const word64 *subkeys, unsigned int rounds)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m1 = {31,30,29,28,27,26,25,24, 15,14,13,12,11,10,9,8};
     const uint8x16_p m2 = {23,22,21,20,19,18,17,16, 7,6,5,4,3,2,1,0};
 #else
@@ -752,7 +752,7 @@ inline void SIMON128_Dec_6_Blocks(uint32x4_p &block0, uint32x4_p &block1,
         y3 = VectorXor(VectorXor(y3, SIMON128_f(x3)), rk2);
     }
 
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m3 = {31,30,29,28,27,26,25,24, 15,14,13,12,11,10,9,8};
     const uint8x16_p m4 = {23,22,21,20,19,18,17,16, 7,6,5,4,3,2,1,0};
 #else
diff --git a/simon64-simd.cpp b/simon64-simd.cpp
index a103dddb..726d74a3 100644
--- a/simon64-simd.cpp
+++ b/simon64-simd.cpp
@@ -105,7 +105,7 @@ inline uint32x4_t RotateRight32(const uint32x4_t& val)
 template <>
 inline uint32x4_t RotateLeft32<8>(const uint32x4_t& val)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8_t maskb[16] = { 14,13,12,15, 10,9,8,11, 6,5,4,7, 2,1,0,3 };
     const uint8x16_t mask = vld1q_u8(maskb);
 #else
@@ -121,7 +121,7 @@ inline uint32x4_t RotateLeft32<8>(const uint32x4_t& val)
 template <>
 inline uint32x4_t RotateRight32<8>(const uint32x4_t& val)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8_t maskb[16] = { 12,15,14,13, 8,11,10,9, 4,7,6,5, 0,3,2,1 };
     const uint8x16_t mask = vld1q_u8(maskb);
 #else
@@ -559,7 +559,7 @@ inline uint32x4_p SIMON64_f(const uint32x4_p val)
 inline void SIMON64_Enc_Block(uint32x4_p &block0, uint32x4_p &block1,
     const word32 *subkeys, unsigned int rounds)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m1 = {7,6,5,4, 15,14,13,12, 23,22,21,20, 31,30,29,28};
     const uint8x16_p m2 = {3,2,1,0, 11,10,9,8, 19,18,17,16, 27,26,25,24};
 #else
@@ -587,7 +587,7 @@ inline void SIMON64_Enc_Block(uint32x4_p &block0, uint32x4_p &block1,
         std::swap(x1, y1);
     }
 
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m3 = {19,18,17,16, 3,2,1,0, 23,22,21,20, 7,6,5,4};
     const uint8x16_p m4 = {27,26,25,24, 11,10,9,8, 31,30,29,28, 15,14,13,12};
 #else
@@ -603,7 +603,7 @@ inline void SIMON64_Enc_Block(uint32x4_p &block0, uint32x4_p &block1,
 inline void SIMON64_Dec_Block(uint32x4_p &block0, uint32x4_p &block1,
     const word32 *subkeys, unsigned int rounds)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m1 = {7,6,5,4, 15,14,13,12, 23,22,21,20, 31,30,29,28};
     const uint8x16_p m2 = {3,2,1,0, 11,10,9,8, 19,18,17,16, 27,26,25,24};
 #else
@@ -632,7 +632,7 @@ inline void SIMON64_Dec_Block(uint32x4_p &block0, uint32x4_p &block1,
         y1 = VectorXor(VectorXor(y1, SIMON64_f(x1)), rk2);
     }
 
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m3 = {19,18,17,16, 3,2,1,0, 23,22,21,20, 7,6,5,4};
     const uint8x16_p m4 = {27,26,25,24, 11,10,9,8, 31,30,29,28, 15,14,13,12};
 #else
@@ -649,7 +649,7 @@ inline void SIMON64_Enc_6_Blocks(uint32x4_p &block0, uint32x4_p &block1,
             uint32x4_p &block2, uint32x4_p &block3, uint32x4_p &block4,
             uint32x4_p &block5, const word32 *subkeys, unsigned int rounds)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m1 = {7,6,5,4, 15,14,13,12, 23,22,21,20, 31,30,29,28};
     const uint8x16_p m2 = {3,2,1,0, 11,10,9,8, 19,18,17,16, 27,26,25,24};
 #else
@@ -687,7 +687,7 @@ inline void SIMON64_Enc_6_Blocks(uint32x4_p &block0, uint32x4_p &block1,
         std::swap(x1, y1); std::swap(x2, y2); std::swap(x3, y3);
     }
 
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m3 = {19,18,17,16, 3,2,1,0, 23,22,21,20, 7,6,5,4};
     const uint8x16_p m4 = {27,26,25,24, 11,10,9,8, 31,30,29,28, 15,14,13,12};
 #else
@@ -708,7 +708,7 @@ inline void SIMON64_Dec_6_Blocks(uint32x4_p &block0, uint32x4_p &block1,
             uint32x4_p &block2, uint32x4_p &block3, uint32x4_p &block4,
             uint32x4_p &block5, const word32 *subkeys, unsigned int rounds)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m1 = {7,6,5,4, 15,14,13,12, 23,22,21,20, 31,30,29,28};
     const uint8x16_p m2 = {3,2,1,0, 11,10,9,8, 19,18,17,16, 27,26,25,24};
 #else
@@ -747,7 +747,7 @@ inline void SIMON64_Dec_6_Blocks(uint32x4_p &block0, uint32x4_p &block1,
         y3 = VectorXor(VectorXor(y3, SIMON64_f(x3)), rk2);
     }
 
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m3 = {19,18,17,16, 3,2,1,0, 23,22,21,20, 7,6,5,4};
     const uint8x16_p m4 = {27,26,25,24, 11,10,9,8, 31,30,29,28, 15,14,13,12};
 #else
diff --git a/speck128-simd.cpp b/speck128-simd.cpp
index da7d949e..abb856a0 100644
--- a/speck128-simd.cpp
+++ b/speck128-simd.cpp
@@ -96,7 +96,7 @@ inline uint64x2_t RotateRight64(const uint64x2_t& val)
 template <>
 inline uint64x2_t RotateLeft64<8>(const uint64x2_t& val)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8_t maskb[16] = { 14,13,12,11, 10,9,8,15, 6,5,4,3, 2,1,0,7 };
     const uint8x16_t mask = vld1q_u8(maskb);
 #else
@@ -112,7 +112,7 @@ inline uint64x2_t RotateLeft64<8>(const uint64x2_t& val)
 template <>
 inline uint64x2_t RotateRight64<8>(const uint64x2_t& val)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8_t maskb[16] = { 8,15,14,13, 12,11,10,9, 0,7,6,5, 4,3,2,1 };
     const uint8x16_t mask = vld1q_u8(maskb);
 #else
@@ -493,7 +493,7 @@ inline uint64x2_p RotateRight64(const uint64x2_p val)
 
 void SPECK128_Enc_Block(uint32x4_p &block, const word64 *subkeys, unsigned int rounds)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m1 = {31,30,29,28,27,26,25,24, 15,14,13,12,11,10,9,8};
     const uint8x16_p m2 = {23,22,21,20,19,18,17,16, 7,6,5,4,3,2,1,0};
 #else
@@ -517,7 +517,7 @@ void SPECK128_Enc_Block(uint32x4_p &block, const word64 *subkeys, unsigned int r
         y1 = VectorXor(y1, x1);
     }
 
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m3 = {31,30,29,28,27,26,25,24, 15,14,13,12,11,10,9,8};
     //const uint8x16_p m4 = {23,22,21,20,19,18,17,16, 7,6,5,4,3,2,1,0};
 #else
@@ -531,7 +531,7 @@ void SPECK128_Enc_Block(uint32x4_p &block, const word64 *subkeys, unsigned int r
 
 void SPECK128_Dec_Block(uint32x4_p &block, const word64 *subkeys, unsigned int rounds)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m1 = {31,30,29,28,27,26,25,24, 15,14,13,12,11,10,9,8};
     const uint8x16_p m2 = {23,22,21,20,19,18,17,16, 7,6,5,4,3,2,1,0};
 #else
@@ -554,7 +554,7 @@ void SPECK128_Dec_Block(uint32x4_p &block, const word64 *subkeys, unsigned int r
         x1 = RotateLeft64<8>(x1);
     }
 
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m3 = {31,30,29,28,27,26,25,24, 15,14,13,12,11,10,9,8};
     //const uint8x16_p m4 = {23,22,21,20,19,18,17,16, 7,6,5,4,3,2,1,0};
 #else
@@ -570,7 +570,7 @@ void SPECK128_Enc_6_Blocks(uint32x4_p &block0, uint32x4_p &block1,
             uint32x4_p &block2, uint32x4_p &block3, uint32x4_p &block4,
             uint32x4_p &block5, const word64 *subkeys, unsigned int rounds)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m1 = {31,30,29,28,27,26,25,24, 15,14,13,12,11,10,9,8};
     const uint8x16_p m2 = {23,22,21,20,19,18,17,16, 7,6,5,4,3,2,1,0};
 #else
@@ -608,7 +608,7 @@ void SPECK128_Enc_6_Blocks(uint32x4_p &block0, uint32x4_p &block1,
         y3 = VectorXor(y3, x3);
     }
 
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m3 = {31,30,29,28,27,26,25,24, 15,14,13,12,11,10,9,8};
     const uint8x16_p m4 = {23,22,21,20,19,18,17,16, 7,6,5,4,3,2,1,0};
 #else
@@ -629,7 +629,7 @@ void SPECK128_Dec_6_Blocks(uint32x4_p &block0, uint32x4_p &block1,
             uint32x4_p &block2, uint32x4_p &block3, uint32x4_p &block4,
             uint32x4_p &block5, const word64 *subkeys, unsigned int rounds)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m1 = {31,30,29,28,27,26,25,24, 15,14,13,12,11,10,9,8};
     const uint8x16_p m2 = {23,22,21,20,19,18,17,16, 7,6,5,4,3,2,1,0};
 #else
@@ -667,7 +667,7 @@ void SPECK128_Dec_6_Blocks(uint32x4_p &block0, uint32x4_p &block1,
         x3 = RotateLeft64<8>(x3);
     }
 
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m3 = {31,30,29,28,27,26,25,24, 15,14,13,12,11,10,9,8};
     const uint8x16_p m4 = {23,22,21,20,19,18,17,16, 7,6,5,4,3,2,1,0};
 #else
diff --git a/speck64-simd.cpp b/speck64-simd.cpp
index e4ce8fa2..fe970679 100644
--- a/speck64-simd.cpp
+++ b/speck64-simd.cpp
@@ -102,7 +102,7 @@ inline uint32x4_t RotateRight32(const uint32x4_t& val)
 template <>
 inline uint32x4_t RotateLeft32<8>(const uint32x4_t& val)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8_t maskb[16] = { 14,13,12,15, 10,9,8,11, 6,5,4,7, 2,1,0,3 };
     const uint8x16_t mask = vld1q_u8(maskb);
 #else
@@ -118,7 +118,7 @@ inline uint32x4_t RotateLeft32<8>(const uint32x4_t& val)
 template <>
 inline uint32x4_t RotateRight32<8>(const uint32x4_t& val)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8_t maskb[16] = { 12,15,14,13, 8,11,10,9, 4,7,6,5, 0,3,2,1 };
     const uint8x16_t mask = vld1q_u8(maskb);
 #else
@@ -498,7 +498,7 @@ inline uint32x4_p RotateRight32(const uint32x4_p val)
 void SPECK64_Enc_Block(uint32x4_p &block0, uint32x4_p &block1,
         const word32 *subkeys, unsigned int rounds)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m1 = {7,6,5,4, 15,14,13,12, 23,22,21,20, 31,30,29,28};
     const uint8x16_p m2 = {3,2,1,0, 11,10,9,8, 19,18,17,16, 27,26,25,24};
 #else
@@ -522,7 +522,7 @@ void SPECK64_Enc_Block(uint32x4_p &block0, uint32x4_p &block1,
         y1 = VectorXor(y1, x1);
     }
 
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m3 = {19,18,17,16, 3,2,1,0, 23,22,21,20, 7,6,5,4};
     const uint8x16_p m4 = {27,26,25,24, 11,10,9,8, 31,30,29,28, 15,14,13,12};
 #else
@@ -538,7 +538,7 @@ void SPECK64_Enc_Block(uint32x4_p &block0, uint32x4_p &block1,
 void SPECK64_Dec_Block(uint32x4_p &block0, uint32x4_p &block1,
         const word32 *subkeys, unsigned int rounds)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m1 = {7,6,5,4, 15,14,13,12, 23,22,21,20, 31,30,29,28};
     const uint8x16_p m2 = {3,2,1,0, 11,10,9,8, 19,18,17,16, 27,26,25,24};
 #else
@@ -562,7 +562,7 @@ void SPECK64_Dec_Block(uint32x4_p &block0, uint32x4_p &block1,
         x1 = RotateLeft32<8>(x1);
     }
 
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m3 = {19,18,17,16, 3,2,1,0, 23,22,21,20, 7,6,5,4};
     const uint8x16_p m4 = {27,26,25,24, 11,10,9,8, 31,30,29,28, 15,14,13,12};
 #else
@@ -579,7 +579,7 @@ void SPECK64_Enc_6_Blocks(uint32x4_p &block0, uint32x4_p &block1,
             uint32x4_p &block2, uint32x4_p &block3, uint32x4_p &block4,
             uint32x4_p &block5, const word32 *subkeys, unsigned int rounds)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m1 = {7,6,5,4, 15,14,13,12, 23,22,21,20, 31,30,29,28};
     const uint8x16_p m2 = {3,2,1,0, 11,10,9,8, 19,18,17,16, 27,26,25,24};
 #else
@@ -620,7 +620,7 @@ void SPECK64_Enc_6_Blocks(uint32x4_p &block0, uint32x4_p &block1,
         y3 = VectorXor(y3, x3);
     }
 
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m3 = {19,18,17,16, 3,2,1,0, 23,22,21,20, 7,6,5,4};
     const uint8x16_p m4 = {27,26,25,24, 11,10,9,8, 31,30,29,28, 15,14,13,12};
 #else
@@ -641,7 +641,7 @@ void SPECK64_Dec_6_Blocks(uint32x4_p &block0, uint32x4_p &block1,
             uint32x4_p &block2, uint32x4_p &block3, uint32x4_p &block4,
             uint32x4_p &block5, const word32 *subkeys, unsigned int rounds)
 {
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m1 = {7,6,5,4, 15,14,13,12, 23,22,21,20, 31,30,29,28};
     const uint8x16_p m2 = {3,2,1,0, 11,10,9,8, 19,18,17,16, 27,26,25,24};
 #else
@@ -682,7 +682,7 @@ void SPECK64_Dec_6_Blocks(uint32x4_p &block0, uint32x4_p &block1,
         x3 = RotateLeft32<8>(x3);
     }
 
-#if defined(CRYPTOPP_BIG_ENDIAN)
+#if (CRYPTOPP_BIG_ENDIAN)
     const uint8x16_p m3 = {19,18,17,16, 3,2,1,0, 23,22,21,20, 7,6,5,4};
     const uint8x16_p m4 = {27,26,25,24, 11,10,9,8, 31,30,29,28, 15,14,13,12};
 #else
diff --git a/validat1.cpp b/validat1.cpp
index b6f2f65a..d7b4ae19 100644
--- a/validat1.cpp
+++ b/validat1.cpp
@@ -1121,7 +1121,7 @@ bool TestAltivecOps()
     pass1 = (0 == std::memcmp(st3, dest+3, 16)) && pass1;
     CRYPTOPP_ASSERT(pass1);
 
-#if defined(CRYPTOPP_LITTLE_ENDIAN)
+#if (CRYPTOPP_LITTLE_ENDIAN)
     VectorStore(VectorLoadBE(src), dest);
     pass1 = (0 != std::memcmp(src, dest, 16)) && pass1;
     CRYPTOPP_ASSERT(pass1);
diff --git a/validat3.cpp b/validat3.cpp
index 40facce2..b7cc2d34 100644
--- a/validat3.cpp
+++ b/validat3.cpp
@@ -214,7 +214,7 @@ bool TestSettings()
 
 	if (w == 0x04030201L)
 	{
-#ifdef CRYPTOPP_LITTLE_ENDIAN
+#if (CRYPTOPP_LITTLE_ENDIAN)
 		std::cout << "passed:  ";
 #else
 		std::cout << "FAILED:  ";
@@ -224,7 +224,7 @@ bool TestSettings()
 	}
 	else if (w == 0x01020304L)
 	{
-#ifndef CRYPTOPP_LITTLE_ENDIAN
+#if (CRYPTOPP_BIG_ENDIAN)
 		std::cout << "passed:  ";
 #else
 		std::cout << "FAILED:  ";