diff --git a/deps/mbedtls/blowfish.c b/deps/mbedtls/blowfish.c
index 9003f0dfeb..5f97f77122 100644
--- a/deps/mbedtls/blowfish.c
+++ b/deps/mbedtls/blowfish.c
@@ -39,10 +39,7 @@
 
 #if !defined(MBEDTLS_BLOWFISH_ALT)
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = (unsigned char*)v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /*
  * 32-bit integer manipulation macros (big endian)
diff --git a/deps/mbedtls/camellia.c b/deps/mbedtls/camellia.c
index ac6f96a83a..b66c61ae9c 100644
--- a/deps/mbedtls/camellia.c
+++ b/deps/mbedtls/camellia.c
@@ -48,10 +48,7 @@
 
 #if !defined(MBEDTLS_CAMELLIA_ALT)
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = (unsigned char*)v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /*
  * 32-bit integer manipulation macros (big endian)
diff --git a/deps/mbedtls/ccm.c b/deps/mbedtls/ccm.c
index 13a8fd1a24..0174097dad 100644
--- a/deps/mbedtls/ccm.c
+++ b/deps/mbedtls/ccm.c
@@ -49,10 +49,7 @@
 #endif /* MBEDTLS_PLATFORM_C */
 #endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = (unsigned char*)v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 #define CCM_ENCRYPT 0
 #define CCM_DECRYPT 1
diff --git a/deps/mbedtls/cipher.c b/deps/mbedtls/cipher.c
index e9e0b223e5..b5503a0279 100644
--- a/deps/mbedtls/cipher.c
+++ b/deps/mbedtls/cipher.c
@@ -60,10 +60,7 @@
 #define MBEDTLS_CIPHER_MODE_STREAM
 #endif
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = (unsigned char*)v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 static int supported_init = 0;
 
diff --git a/deps/mbedtls/cmac.c b/deps/mbedtls/cmac.c
index 035ad071d4..0f0c772636 100644
--- a/deps/mbedtls/cmac.c
+++ b/deps/mbedtls/cmac.c
@@ -65,10 +65,7 @@
 #endif /* MBEDTLS_SELF_TEST */
 #endif /* MBEDTLS_PLATFORM_C */
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = (unsigned char*)v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /*
  * Multiplication by u in the Galois field of GF(2^n)
diff --git a/deps/mbedtls/ctr_drbg.c b/deps/mbedtls/ctr_drbg.c
index 55612c7fc9..44ddeb313a 100644
--- a/deps/mbedtls/ctr_drbg.c
+++ b/deps/mbedtls/ctr_drbg.c
@@ -49,10 +49,7 @@
 #endif /* MBEDTLS_PLATFORM_C */
 #endif /* MBEDTLS_SELF_TEST */
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /*
  * CTR_DRBG context initialization
diff --git a/deps/mbedtls/des.c b/deps/mbedtls/des.c
index 09f95cfc3b..1c50f24cd9 100644
--- a/deps/mbedtls/des.c
+++ b/deps/mbedtls/des.c
@@ -48,10 +48,7 @@
 
 #if !defined(MBEDTLS_DES_ALT)
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = (unsigned char*)v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /*
  * 32-bit integer manipulation macros (big endian)
diff --git a/deps/mbedtls/dhm.c b/deps/mbedtls/dhm.c
index bec52a11df..c82926c713 100644
--- a/deps/mbedtls/dhm.c
+++ b/deps/mbedtls/dhm.c
@@ -57,10 +57,7 @@
 #define mbedtls_free       free
 #endif
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /*
  * helper to validate the mbedtls_mpi size and import it
diff --git a/deps/mbedtls/ecp.c b/deps/mbedtls/ecp.c
index 5ad6863987..92df13da57 100644
--- a/deps/mbedtls/ecp.c
+++ b/deps/mbedtls/ecp.c
@@ -72,10 +72,7 @@
 #define inline __inline
 #endif
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 #if defined(MBEDTLS_SELF_TEST)
 /*
diff --git a/deps/mbedtls/entropy.c b/deps/mbedtls/entropy.c
index d4d1b27b7f..75e2ea7389 100644
--- a/deps/mbedtls/entropy.c
+++ b/deps/mbedtls/entropy.c
@@ -59,10 +59,7 @@
 #include "mbedtls/havege.h"
 #endif
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 #define ENTROPY_MAX_LOOP    256     /**< Maximum amount to loop before error */
 
diff --git a/deps/mbedtls/gcm.c b/deps/mbedtls/gcm.c
index fccb092bdd..2f9a628ec2 100644
--- a/deps/mbedtls/gcm.c
+++ b/deps/mbedtls/gcm.c
@@ -77,10 +77,7 @@
 }
 #endif
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /*
  * Initialize a context
diff --git a/deps/mbedtls/havege.c b/deps/mbedtls/havege.c
index 2b75ef7bd8..8109ae8ad8 100644
--- a/deps/mbedtls/havege.c
+++ b/deps/mbedtls/havege.c
@@ -39,10 +39,7 @@
 
 #include <string.h>
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /* ------------------------------------------------------------------------
  * On average, one iteration accesses two 8-word blocks in the havege WALK
diff --git a/deps/mbedtls/hmac_drbg.c b/deps/mbedtls/hmac_drbg.c
index bf5f9b5bd3..c3ed532697 100644
--- a/deps/mbedtls/hmac_drbg.c
+++ b/deps/mbedtls/hmac_drbg.c
@@ -50,10 +50,7 @@
 #endif /* MBEDTLS_SELF_TEST */
 #endif /* MBEDTLS_PLATFORM_C */
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /*
  * HMAC_DRBG context initialization
diff --git a/deps/mbedtls/md.c b/deps/mbedtls/md.c
index eda98f6361..4584310d81 100644
--- a/deps/mbedtls/md.c
+++ b/deps/mbedtls/md.c
@@ -48,10 +48,7 @@
 #include <stdio.h>
 #endif
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /*
  * Reminder: update profiles in x509_crt.c when adding a new hash!
diff --git a/deps/mbedtls/md2.c b/deps/mbedtls/md2.c
index 95cbcce658..647fce97b3 100644
--- a/deps/mbedtls/md2.c
+++ b/deps/mbedtls/md2.c
@@ -48,10 +48,7 @@
 
 #if !defined(MBEDTLS_MD2_ALT)
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 static const unsigned char PI_SUBST[256] =
 {
diff --git a/deps/mbedtls/md4.c b/deps/mbedtls/md4.c
index 11a77e3ae4..f436191cb1 100644
--- a/deps/mbedtls/md4.c
+++ b/deps/mbedtls/md4.c
@@ -48,10 +48,7 @@
 
 #if !defined(MBEDTLS_MD4_ALT)
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /*
  * 32-bit integer manipulation macros (little endian)
diff --git a/deps/mbedtls/md5.c b/deps/mbedtls/md5.c
index 5d972dc9dd..40b70a95d2 100644
--- a/deps/mbedtls/md5.c
+++ b/deps/mbedtls/md5.c
@@ -47,10 +47,7 @@
 
 #if !defined(MBEDTLS_MD5_ALT)
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /*
  * 32-bit integer manipulation macros (little endian)
diff --git a/deps/mbedtls/memory_buffer_alloc.c b/deps/mbedtls/memory_buffer_alloc.c
index 545d5a2c32..6fb45375eb 100644
--- a/deps/mbedtls/memory_buffer_alloc.c
+++ b/deps/mbedtls/memory_buffer_alloc.c
@@ -42,10 +42,7 @@
 #include "mbedtls/threading.h"
 #endif
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 #define MAGIC1       0xFF00AA55
 #define MAGIC2       0xEE119966
diff --git a/deps/mbedtls/pem.c b/deps/mbedtls/pem.c
index 8dd86a4ac9..37e857e92c 100644
--- a/deps/mbedtls/pem.c
+++ b/deps/mbedtls/pem.c
@@ -45,10 +45,7 @@
 #endif
 
 #if defined(MBEDTLS_PEM_PARSE_C)
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 void mbedtls_pem_init( mbedtls_pem_context *ctx )
 {
diff --git a/deps/mbedtls/pk.c b/deps/mbedtls/pk.c
index 8d13bc5ce3..a6e71bfb12 100644
--- a/deps/mbedtls/pk.c
+++ b/deps/mbedtls/pk.c
@@ -43,10 +43,7 @@
 
 #include <limits.h>
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /*
  * Initialise a mbedtls_pk_context
diff --git a/deps/mbedtls/pk_wrap.c b/deps/mbedtls/pk_wrap.c
index db6274cbf9..382bbb46d8 100644
--- a/deps/mbedtls/pk_wrap.c
+++ b/deps/mbedtls/pk_wrap.c
@@ -53,10 +53,7 @@
 #include <limits.h>
 
 #if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 #endif
 
 #if defined(MBEDTLS_RSA_C)
diff --git a/deps/mbedtls/pkcs12.c b/deps/mbedtls/pkcs12.c
index c603a13577..048ff2e3af 100644
--- a/deps/mbedtls/pkcs12.c
+++ b/deps/mbedtls/pkcs12.c
@@ -47,10 +47,7 @@
 #include "mbedtls/des.h"
 #endif
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 static int pkcs12_parse_pbe_params( mbedtls_asn1_buf *params,
                                     mbedtls_asn1_buf *salt, int *iterations )
diff --git a/deps/mbedtls/pkparse.c b/deps/mbedtls/pkparse.c
index efdf437466..3dee28999d 100644
--- a/deps/mbedtls/pkparse.c
+++ b/deps/mbedtls/pkparse.c
@@ -61,10 +61,7 @@
 #endif
 
 #if defined(MBEDTLS_FS_IO)
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /*
  * Load all data from a file into a given buffer.
diff --git a/deps/mbedtls/ripemd160.c b/deps/mbedtls/ripemd160.c
index cdb0a63c0f..975c8ac7a5 100644
--- a/deps/mbedtls/ripemd160.c
+++ b/deps/mbedtls/ripemd160.c
@@ -69,10 +69,7 @@
 }
 #endif
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 void mbedtls_ripemd160_init( mbedtls_ripemd160_context *ctx )
 {
diff --git a/deps/mbedtls/rsa.c b/deps/mbedtls/rsa.c
index bdd2538c3a..eb5e6b8341 100644
--- a/deps/mbedtls/rsa.c
+++ b/deps/mbedtls/rsa.c
@@ -66,10 +66,7 @@
 #define mbedtls_free   free
 #endif
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = (unsigned char*)v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /*
  * Initialize an RSA context
diff --git a/deps/mbedtls/sha1.c b/deps/mbedtls/sha1.c
index 2ccf2a2f52..b02192984f 100644
--- a/deps/mbedtls/sha1.c
+++ b/deps/mbedtls/sha1.c
@@ -47,10 +47,7 @@
 
 #if !defined(MBEDTLS_SHA1_ALT)
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = (unsigned char*)v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /*
  * 32-bit integer manipulation macros (big endian)
diff --git a/deps/mbedtls/sha256.c b/deps/mbedtls/sha256.c
index ad25d38333..c3782b371e 100644
--- a/deps/mbedtls/sha256.c
+++ b/deps/mbedtls/sha256.c
@@ -50,10 +50,7 @@
 
 #if !defined(MBEDTLS_SHA256_ALT)
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /*
  * 32-bit integer manipulation macros (big endian)
diff --git a/deps/mbedtls/sha512.c b/deps/mbedtls/sha512.c
index 724522ac68..d4abca369e 100644
--- a/deps/mbedtls/sha512.c
+++ b/deps/mbedtls/sha512.c
@@ -56,10 +56,7 @@
 
 #if !defined(MBEDTLS_SHA512_ALT)
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /*
  * 64-bit integer manipulation macros (big endian)
diff --git a/deps/mbedtls/ssl_cli.c b/deps/mbedtls/ssl_cli.c
index b73e416458..08de5b7365 100644
--- a/deps/mbedtls/ssl_cli.c
+++ b/deps/mbedtls/ssl_cli.c
@@ -48,10 +48,7 @@
 #endif
 
 #if defined(MBEDTLS_SSL_SESSION_TICKETS)
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 #endif
 
 #if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
diff --git a/deps/mbedtls/ssl_cookie.c b/deps/mbedtls/ssl_cookie.c
index caf119990d..f2c112e74d 100644
--- a/deps/mbedtls/ssl_cookie.c
+++ b/deps/mbedtls/ssl_cookie.c
@@ -43,10 +43,7 @@
 
 #include <string.h>
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /*
  * If DTLS is in use, then at least one of SHA-1, SHA-256, SHA-512 is
diff --git a/deps/mbedtls/ssl_srv.c b/deps/mbedtls/ssl_srv.c
index be961af710..c18b19a6fe 100644
--- a/deps/mbedtls/ssl_srv.c
+++ b/deps/mbedtls/ssl_srv.c
@@ -50,10 +50,7 @@
 #endif
 
 #if defined(MBEDTLS_SSL_SESSION_TICKETS)
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 #endif
 
 #if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY)
diff --git a/deps/mbedtls/ssl_ticket.c b/deps/mbedtls/ssl_ticket.c
index 4d9116d214..5c77c1c359 100644
--- a/deps/mbedtls/ssl_ticket.c
+++ b/deps/mbedtls/ssl_ticket.c
@@ -39,10 +39,7 @@
 
 #include <string.h>
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /*
  * Initialze context
diff --git a/deps/mbedtls/ssl_tls.c b/deps/mbedtls/ssl_tls.c
index 661ae7065b..e417d1915a 100644
--- a/deps/mbedtls/ssl_tls.c
+++ b/deps/mbedtls/ssl_tls.c
@@ -53,10 +53,7 @@
 #include "mbedtls/oid.h"
 #endif
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /* Length of the "epoch" field in the record header */
 static inline size_t ssl_ep_len( const mbedtls_ssl_context *ssl )
diff --git a/deps/mbedtls/x509_crl.c b/deps/mbedtls/x509_crl.c
index 76c49f1353..c6e57974ab 100644
--- a/deps/mbedtls/x509_crl.c
+++ b/deps/mbedtls/x509_crl.c
@@ -66,10 +66,7 @@
 #include <stdio.h>
 #endif
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /*
  *  Version  ::=  INTEGER  {  v1(0), v2(1)  }
diff --git a/deps/mbedtls/x509_crt.c b/deps/mbedtls/x509_crt.c
index a2305beb2e..3961c8489c 100644
--- a/deps/mbedtls/x509_crt.c
+++ b/deps/mbedtls/x509_crt.c
@@ -75,10 +75,7 @@
 #endif /* !_WIN32 || EFIX64 || EFI32 */
 #endif
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /*
  * Default profile
diff --git a/deps/mbedtls/x509_csr.c b/deps/mbedtls/x509_csr.c
index f92b66c58f..b9b8b7a518 100644
--- a/deps/mbedtls/x509_csr.c
+++ b/deps/mbedtls/x509_csr.c
@@ -60,10 +60,7 @@
 #include <stdio.h>
 #endif
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /*
  *  Version  ::=  INTEGER  {  v1(0)  }
diff --git a/deps/mbedtls/x509write_crt.c b/deps/mbedtls/x509write_crt.c
index d1d9a22a7e..a1b7b62d9e 100644
--- a/deps/mbedtls/x509write_crt.c
+++ b/deps/mbedtls/x509write_crt.c
@@ -44,10 +44,7 @@
 #include "mbedtls/pem.h"
 #endif /* MBEDTLS_PEM_WRITE_C */
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 void mbedtls_x509write_crt_init( mbedtls_x509write_cert *ctx )
 {
diff --git a/deps/mbedtls/x509write_csr.c b/deps/mbedtls/x509write_csr.c
index 8fd856b2a2..33b3ea78a7 100644
--- a/deps/mbedtls/x509write_csr.c
+++ b/deps/mbedtls/x509write_csr.c
@@ -43,10 +43,7 @@
 #include "mbedtls/pem.h"
 #endif
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 void mbedtls_x509write_csr_init( mbedtls_x509write_csr *ctx )
 {
diff --git a/deps/mbedtls/xtea.c b/deps/mbedtls/xtea.c
index fe0a3509f6..fb2d6dce23 100644
--- a/deps/mbedtls/xtea.c
+++ b/deps/mbedtls/xtea.c
@@ -42,10 +42,7 @@
 
 #if !defined(MBEDTLS_XTEA_ALT)
 
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
+#include "arc4_alt.h"
 
 /*
  * 32-bit integer manipulation macros (big endian)