diff --git a/Lib/tabnanny.py b/Lib/tabnanny.py
index 0ae5e9f..2c6fb0c 100755
--- a/Lib/tabnanny.py
+++ b/Lib/tabnanny.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 
 """The Tab Nanny despises ambiguous indentation.  She knows no mercy.