diff --git a/monasca_notification/notification.py b/monasca_notification/notification.py
index 4e88611..1a8b705 100644
--- a/monasca_notification/notification.py
+++ b/monasca_notification/notification.py
@@ -91,6 +91,9 @@ class Notification(object):
 
         return True
 
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
     def to_json(self):
         """Return json representation
         """