1 files changed, 1 insertions, 1 deletions

diff --git a/synapse/storage/roommember.py b/synapse/storage/roommember.py

index e18cfcd948..526c94f808 100644
--- a/synapse/storage/roommember.py
+++ b/synapse/storage/roommember.py
@@ -113,7 +113,7 @@ class RoomMemberWorkerStore(EventsWorkerStore):
             txn.execute(sql, (room_id,))
             for r in txn:
                 summary = res.setdefault(to_ascii(r[1]), {})
-                summary.put('count', r[0])
+                summary['count'] = r[0]
 
             return res