1 files changed, 3 insertions, 1 deletions
diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py
index 5e3d3886eb..1a7190085a 100644
--- a/synapse/handlers/message.py
+++ b/synapse/handlers/message.py
@@ -246,7 +246,9 @@ class MessageHandler:
                 room_state = room_state_events[membership_event_id]
 
         now = self.clock.time_msec()
-        events = await self._event_serializer.serialize_events(room_state.values(), now)
+        events = await self._event_serializer.serialize_events(
+            room_state.values(), now, bundle_aggregations=True
+        )
         return events
 
     async def get_joined_members(self, requester: Requester, room_id: str) -> dict: