1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/handlers/device.py b/synapse/handlers/device.py
index 67953a3ed9..2b2208f3e6 100644
--- a/synapse/handlers/device.py
+++ b/synapse/handlers/device.py
@@ -216,7 +216,7 @@ class DeviceWorkerHandler:
         )
 
         # Then work out if any users have since joined
-        rooms_changed = self.store.get_rooms_that_changed(room_ids, from_token.room_key)
+        rooms_changed = await self.store.get_rooms_that_changed(room_ids, from_token.room_key)
 
         member_events = await self.store.get_membership_changes_for_user(
             user_id, from_token.room_key, now_room_key