--- a/contrib/perf-utils/perf-revlog-write-plot.py	Mon Nov 09 09:58:44 2020 -0800
+++ b/contrib/perf-utils/perf-revlog-write-plot.py	Fri Nov 06 13:58:59 2020 -0800
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 #  Copyright 2018 Paul Morelle <Paul.Morelle@octobus.net>
 #