diff --git a/isso/ext/notifications.py b/isso/ext/notifications.py
index 1f98002..f155ce7 100644
--- a/isso/ext/notifications.py
+++ b/isso/ext/notifications.py
@@ -2,6 +2,7 @@
 
 from __future__ import unicode_literals
 
+import os
 import sys
 import io
 import time