diff --git a/tools/pylibopenflow/bin/pyopenflow-ping-controller.py b/tools/pylibopenflow/bin/pyopenflow-ping-controller.py
old mode 100755
new mode 100644
index e5aa030..cae3a43
--- a/tools/pylibopenflow/bin/pyopenflow-ping-controller.py
+++ b/tools/pylibopenflow/bin/pyopenflow-ping-controller.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2.5
+#!/usr/bin/env python
 """This script fakes as an OpenFlow switch to the controller
 
 (C) Copyright Stanford University