diff --git a/migrations/20140823_remove_undefined_and_false_notifications.js b/migrations/20140823_remove_undefined_and_false_notifications.js
new file mode 100644
index 0000000000..77882c4be7
--- /dev/null
+++ b/migrations/20140823_remove_undefined_and_false_notifications.js
@@ -0,0 +1,13 @@
+db.users.find({}).forEach(function(user){
+  var newNewMessages = {};
+
+ for(var key in user.newMessages) {
+    var val = user.newMessages[key];
+    // print("\n" + key + " " + val);
+    if(key != "undefined" && val['value']){
+      newNewMessages[key] = val;
+    }
+ }
+
+  db.users.update({_id: user._id}, {$set: {'newMessages': newNewMessages}});
+});