diff --git a/zephyr/views.py b/zephyr/views.py
index 89e34f2215..30d47f66a7 100644
--- a/zephyr/views.py
+++ b/zephyr/views.py
@@ -438,6 +438,7 @@ def get_updates_backend(request, user_profile, handler, client_id,
         try:
             kwargs.update(cb_kwargs)
             res = format_updates_response(user_profile=user_profile,
+                                          client_server_generation=client_server_generation,
                                           **kwargs)
             send_with_safety_check(res, handler, **kwargs)
         except socket.error: