diff --git a/check_whence.py b/check_whence.py
index 42480892..357c1311 100755
--- a/check_whence.py
+++ b/check_whence.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 
 import os, re, stat, sys
 from io import open