diff --git a/Lib/idlelib/macosx_main.py b/Lib/idlelib/macosx_main.py
index 9a965ed..2520a68 100644
--- a/Lib/idlelib/macosx_main.py
+++ b/Lib/idlelib/macosx_main.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env pythonw
 """IDLE.app
 
 Installation: