diff --git a/library/pk_wrap.c b/library/pk_wrap.c
index 3fe2c3e..a4dc655 100644
--- a/library/pk_wrap.c
+++ b/library/pk_wrap.c
@@ -1637,8 +1637,7 @@
 
 static void rsa_alt_free_wrap(void *ctx)
 {
-    mbedtls_platform_zeroize(ctx, sizeof(mbedtls_rsa_alt_context));
-    mbedtls_free(ctx);
+    mbedtls_zeroize_and_free(ctx, sizeof(mbedtls_rsa_alt_context));
 }
 
 const mbedtls_pk_info_t mbedtls_rsa_alt_info = {