diff --git a/crypto/cryptlib.c b/crypto/cryptlib.c
index 0566ec1f9..dec3286f6 100644
--- a/crypto/cryptlib.c
+++ b/crypto/cryptlib.c
@@ -543,6 +543,8 @@ void OpenSSLDie(const char *file,int line,const char *assertion)
 
 void *OPENSSL_stderr(void)	{ return stderr; }
 
+#ifndef OPENSSL_FIPS
+
 int CRYPTO_memcmp(const void *in_a, const void *in_b, size_t len)
 	{
 	size_t i;
@@ -555,3 +557,4 @@ int CRYPTO_memcmp(const void *in_a, const void *in_b, size_t len)
 
 	return x;
 	}
+#endif
diff --git a/crypto/o_init.c b/crypto/o_init.c
index d767a90a5..c89fda589 100644
--- a/crypto/o_init.c
+++ b/crypto/o_init.c
@@ -93,4 +93,18 @@ void OPENSSL_init(void)
 #endif
 	}
 		
+#ifdef OPENSSL_FIPS
 
+int CRYPTO_memcmp(const void *in_a, const void *in_b, size_t len)
+	{
+	size_t i;
+	const unsigned char *a = in_a;
+	const unsigned char *b = in_b;
+	unsigned char x = 0;
+
+	for (i = 0; i < len; i++)
+		x |= a[i] ^ b[i];
+
+	return x;
+	}
+#endif