diff --git a/src/tkc/func_call_parser.c b/src/tkc/func_call_parser.c
index 10c2cccbe..3b1e6ed54 100644
--- a/src/tkc/func_call_parser.c
+++ b/src/tkc/func_call_parser.c
@@ -50,7 +50,7 @@ ret_t func_call_parser_parse(func_call_parser_t* parser) {
     token = tokenizer_next(tokenizer);
     tk_strncpy(name, token, TK_NAME_LEN);
 
-    ENSURE(tokenizer_has_more(tokenizer));
+    return_value_if_fail(tokenizer_has_more(tokenizer), RET_BAD_PARAMS);
     token = tokenizer_next(tokenizer);
 
     if (parser->on_param != NULL) {