diff --git a/src/userfunc.c b/src/userfunc.c
index 00e499f..ce144a3 100644
--- a/src/userfunc.c
+++ b/src/userfunc.c
@@ -4977,7 +4977,10 @@
 					: eval_isnamec(name_base[i])); ++i)
 		;
 	    if (name_base[i] != NUL)
+	    {
 		emsg_funcname(e_invalid_argument_str, arg);
+		goto ret_free;
+	    }
 
 	    // In Vim9 script a function cannot have the same name as a
 	    // variable.