/usr/local/bin/python -> /usr/bin/env python
diff --git a/Demo/tkinter/guido/electrons.py b/Demo/tkinter/guido/electrons.py
index 7296955..f3b8008 100755
--- a/Demo/tkinter/guido/electrons.py
+++ b/Demo/tkinter/guido/electrons.py
@@ -1,4 +1,4 @@
-#! /usr/local/bin/python
+#! /usr/bin/env python
 
 # Simulate "electrons" migrating across the screen.  
 # An optional bitmap file in can be in the background.