diff --git a/bson/objectid.py b/bson/objectid.py
index 357554fcd..4abf7ca57 100644
--- a/bson/objectid.py
+++ b/bson/objectid.py
@@ -235,6 +235,11 @@ class ObjectId(object):
             return self.__id == other.__id
         return NotImplemented
 
+    def __ne__(self,other):
+        if isinstance(other, ObjectId):
+            return self.__id != other.__id
+        return NotImplemented
+
     def __lt__(self, other):
         if isinstance(other, ObjectId):
             return self.__id < other.__id