Make content of tag an empty object rather than null

1 files changed, 1 insertions, 1 deletions

diff --git a/synapse/server_notices/server_notices_manager.py b/synapse/server_notices/server_notices_manager.py

index 5968104a99..a5e4728859 100644
--- a/synapse/server_notices/server_notices_manager.py
+++ b/synapse/server_notices/server_notices_manager.py
@@ -154,7 +154,7 @@ class ServerNoticesManager(object):
         )
         room_id = info['room_id']
         yield self._store.add_tag_to_room(
-            user_id, room_id, SERVER_NOTICE_ROOM_TAG, None
+            user_id, room_id, SERVER_NOTICE_ROOM_TAG, {},
         )
 
         logger.info("Created server notices room %s for %s", room_id, user_id)