diff --git a/library/x509_crl.c b/library/x509_crl.c
index 8a92ca0..d295229 100644
--- a/library/x509_crl.c
+++ b/library/x509_crl.c
@@ -347,7 +347,7 @@
     if( p == NULL )
         return( MBEDTLS_ERR_X509_ALLOC_FAILED );
 
-    memcpy( p, buf, buflen );
+    mbedtls_platform_memcpy( p, buf, buflen );
 
     crl->raw.p = p;
     crl->raw.len = buflen;