diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py
index 6dd7a41f04..0cb6c521c4 100644
--- a/synapse/handlers/room.py
+++ b/synapse/handlers/room.py
@@ -210,7 +210,7 @@ class RoomCreationHandler(BaseHandler):
                 ratelimit=False)
 
         for invitee in invite_list:
-            room_member_handler.update_membership(
+            yield room_member_handler.update_membership(
                 requester,
                 UserID.from_string(invitee),
                 room_id,