diff --git a/wolfssl/ssl.h b/wolfssl/ssl.h
index 356bf6185..ca1f6aa01 100644
--- a/wolfssl/ssl.h
+++ b/wolfssl/ssl.h
@@ -1093,7 +1093,7 @@ WOLFSSL_API void wolfSSL_sk_ACCESS_DESCRIPTION_pop_free(WOLFSSL_STACK* sk,
 WOLFSSL_API void wolfSSL_ACCESS_DESCRIPTION_free(WOLFSSL_ACCESS_DESCRIPTION* access);
 WOLFSSL_API void wolfSSL_sk_X509_EXTENSION_pop_free(
         WOLF_STACK_OF(WOLFSSL_X509_EXTENSION)* sk,
-        void f (WOLFSSL_X509_EXTENSION*));
+        void (*f) (WOLFSSL_X509_EXTENSION*));
 WOLFSSL_API WOLF_STACK_OF(WOLFSSL_X509_EXTENSION)* wolfSSL_sk_X509_EXTENSION_new_null(void);
 WOLFSSL_API WOLFSSL_ASN1_OBJECT* wolfSSL_ASN1_OBJECT_new(void);
 WOLFSSL_API void wolfSSL_ASN1_OBJECT_free(WOLFSSL_ASN1_OBJECT* obj);