diff --git a/tools/thumb-cc.py b/tools/thumb-cc.py
index 53d1051bef..9e2b96c346 100755
--- a/tools/thumb-cc.py
+++ b/tools/thumb-cc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 # -*- coding: utf8 -*-
 #             __________               __   ___.
 #   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___