diff --git a/tools/perf/util/help.c b/tools/perf/util/help.c
index 8b1f6e8..7b68978 100644
--- a/tools/perf/util/help.c
+++ b/tools/perf/util/help.c
@@ -263,9 +263,8 @@
 
 	for (i = 0; i < old->cnt; i++)
 		cmds->names[cmds->cnt++] = old->names[i];
-	free(old->names);
+	zfree(&old->names);
 	old->cnt = 0;
-	old->names = NULL;
 }
 
 const char *help_unknown_cmd(const char *cmd)