diff --git a/src/test/utils/McastTraffic.py b/src/test/utils/McastTraffic.py
old mode 100644
new mode 100755
index c25cb1a..0cf1690
--- a/src/test/utils/McastTraffic.py
+++ b/src/test/utils/McastTraffic.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 # 
 # Copyright 2016-present Ciena Corporation
 #