diff --git a/app/serializers/current_user_serializer.rb b/app/serializers/current_user_serializer.rb
index e60da521b..498632e4a 100644
--- a/app/serializers/current_user_serializer.rb
+++ b/app/serializers/current_user_serializer.rb
@@ -34,7 +34,8 @@ class CurrentUserSerializer < BasicUserSerializer
              :read_faq,
              :automatically_unpin_topics,
              :mailing_list_mode,
-             :previous_visit_at
+             :previous_visit_at,
+             :seen_notification_id
 
   def include_site_flagged_posts_count?
     object.staff?