diff --git a/library/x509_crt.c b/library/x509_crt.c
index b9a3216..e537983 100644
--- a/library/x509_crt.c
+++ b/library/x509_crt.c
@@ -1559,7 +1559,7 @@
         if( crt->raw.p == NULL )
             return( MBEDTLS_ERR_X509_ALLOC_FAILED );
         crt->raw.len = buflen;
-        memcpy( crt->raw.p, buf, buflen );
+        mbedtls_platform_memcpy( crt->raw.p, buf, buflen );
 
         crt->own_buffer = 1;
     }
@@ -1942,7 +1942,7 @@
 
     mbedtls_platform_memset( szDir, 0, sizeof(szDir) );
     mbedtls_platform_memset( filename, 0, MAX_PATH );
-    memcpy( filename, path, len );
+    mbedtls_platform_memcpy( filename, path, len );
     filename[len++] = '\\';
     p = filename + len;
     filename[len++] = '*';