diff --git a/CryptoPkg/Library/IntrinsicLib/CopyMem.c b/CryptoPkg/Library/IntrinsicLib/CopyMem.c
index e29b4918d2..7faf5a34d8 100644
--- a/CryptoPkg/Library/IntrinsicLib/CopyMem.c
+++ b/CryptoPkg/Library/IntrinsicLib/CopyMem.c
@@ -10,8 +10,21 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 #include <Base.h>
 #include <Library/BaseMemoryLib.h>
 
+#if defined(__clang__) && !defined(__APPLE__)
+
+/* Copies bytes between buffers */
+static __attribute__((__used__))
+void * __memcpy (void *dest, const void *src, unsigned int count)
+{
+  return CopyMem (dest, src, (UINTN)count);
+}
+__attribute__((__alias__("__memcpy")))
+void * memcpy (void *dest, const void *src, unsigned int count);
+
+#else
 /* Copies bytes between buffers */
 void * memcpy (void *dest, const void *src, unsigned int count)
 {
   return CopyMem (dest, src, (UINTN)count);
 }
+#endif