diff --git a/library/ccm.c b/library/ccm.c
index 9258082..f6a751c 100644
--- a/library/ccm.c
+++ b/library/ccm.c
@@ -211,7 +211,7 @@
 
 
     /* Start CBC-MAC with first block */
-    mbedtls_platform_memset( y, 0, 16 );
+    memset( y, 0, 16 );
     UPDATE_CBC_MAC;
 
     /*