diff --git a/src/arg.c b/src/arg.c
index 982bab5..31e7e02 100644
--- a/src/arg.c
+++ b/src/arg.c
@@ -399,8 +399,7 @@
 	 * in between, there is no arg at all.
 	 */
 	if (!pos) {
-		free(*argp);
-		*argp = NULL;
+		ha_free(argp);
 	}
 
 	if (pos >= min_arg)