diff --git a/library/aes.c b/library/aes.c
index 4850fab..247bbde 100644
--- a/library/aes.c
+++ b/library/aes.c
@@ -519,7 +519,7 @@
 {
     AES_VALIDATE( ctx != NULL );
 
-    mbedtls_platform_memset( ctx, 0, sizeof( mbedtls_aes_context ) );
+    memset( ctx, 0, sizeof( mbedtls_aes_context ) );
 }
 
 void mbedtls_aes_free( mbedtls_aes_context *ctx )