diff --git a/library/cipher.c b/library/cipher.c
index 47dfe24..53ed9b3 100644
--- a/library/cipher.c
+++ b/library/cipher.c
@@ -156,7 +156,7 @@
 void mbedtls_cipher_init( mbedtls_cipher_context_t *ctx )
 {
     CIPHER_VALIDATE( ctx != NULL );
-    mbedtls_platform_memset( ctx, 0, sizeof( mbedtls_cipher_context_t ) );
+    memset( ctx, 0, sizeof( mbedtls_cipher_context_t ) );
 }
 
 void mbedtls_cipher_free( mbedtls_cipher_context_t *ctx )