diff --git a/demo/guide-python/sklearn_examples.py b/demo/guide-python/sklearn_examples.py
old mode 100644
new mode 100755
index 96cd876e9..dd0620a7c
--- a/demo/guide-python/sklearn_examples.py
+++ b/demo/guide-python/sklearn_examples.py
@@ -1,3 +1,4 @@
+#!/usr/bin/python
 '''
 Created on 1 Apr 2015