diff --git a/libavutil/ppc/util_altivec.h b/libavutil/ppc/util_altivec.h
index 2c0ad5f6c6..4892a27b4d 100644
--- a/libavutil/ppc/util_altivec.h
+++ b/libavutil/ppc/util_altivec.h
@@ -85,8 +85,17 @@ do { \
 } while (0)
 
 
+#if HAVE_BIGENDIAN
+#define VEC_LD(offset,b)                                   \
+    vec_perm(vec_ld(offset, b), vec_ld(offset+15, b), vec_lvsl(offset, b))
+#else
+#define VEC_LD(offset,b)                                   \
+    vec_vsx_ld(offset, b)
+#endif
+
 /** @brief loads unaligned vector @a *src with offset @a offset
     and returns it */
+#if HAVE_BIGENDIAN
 static inline vector unsigned char unaligned_load(int offset, uint8_t *src)
 {
     register vector unsigned char first = vec_ld(offset, src);
@@ -94,6 +103,10 @@ static inline vector unsigned char unaligned_load(int offset, uint8_t *src)
     register vector unsigned char mask = vec_lvsl(offset, src);
     return vec_perm(first, second, mask);
 }
+#else
+#define unaligned_load(a,b) VEC_LD(a,b)
+#endif
+
 
 /**
  * loads vector known misalignment
@@ -106,8 +119,22 @@ static inline vec_u8 load_with_perm_vec(int offset, uint8_t *src, vec_u8 perm_ve
     return vec_perm(a, b, perm_vec);
 }
 
-#define vec_unaligned_load(b)                                   \
-    vec_perm(vec_ld(0, b), vec_ld(15, b), vec_lvsl(0, b));
+#define vec_unaligned_load(b)  VEC_LD(0, b)
+
+#if HAVE_BIGENDIAN
+#define VEC_MERGEH(a, b) vec_mergeh(a, b)
+#define VEC_MERGEL(a, b) vec_mergel(a, b)
+#else
+#define VEC_MERGEH(a, b) vec_mergeh(b, a)
+#define VEC_MERGEL(a, b) vec_mergel(b, a)
+#endif
+
+#if HAVE_BIGENDIAN
+#define VEC_ST(a,b,c) vec_st(a,b,c)
+#else
+#define VEC_ST(a,b,c) vec_vsx_st(a,b,c)
+#endif
+
 
 #endif /* HAVE_ALTIVEC */