diff --git a/src/x509_str.c b/src/x509_str.c
index c5d712e18..bdb388f86 100644
--- a/src/x509_str.c
+++ b/src/x509_str.c
@@ -1194,15 +1194,15 @@ void wolfSSL_X509_STORE_free(WOLFSSL_X509_STORE* store)
             }
 #if defined(OPENSSL_EXTRA)
             if (store->certs != NULL) {
-                wolfSSL_sk_X509_pop_free(store->certs, wolfSSL_X509_free);
+                wolfSSL_sk_X509_pop_free(store->certs, NULL);
                 store->certs = NULL;
             }
             if (store->owned != NULL) {
-                wolfSSL_sk_X509_pop_free(store->owned, wolfSSL_X509_free);
+                wolfSSL_sk_X509_pop_free(store->owned, NULL);
                 store->owned = NULL;
             }
             if (store->trusted != NULL) {
-                wolfSSL_sk_X509_pop_free(store->trusted, wolfSSL_X509_free);
+                wolfSSL_sk_X509_pop_free(store->trusted, NULL);
                 store->trusted = NULL;
             }
 #endif