1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/storage/databases/main/state.py b/synapse/storage/databases/main/state.py
index 62bc4600fb..c5caaf56b0 100644
--- a/synapse/storage/databases/main/state.py
+++ b/synapse/storage/databases/main/state.py
@@ -535,7 +535,7 @@ class StateGroupWorkerStore(EventsWorkerStore, SQLBaseStore):
             desc="check_if_events_in_current_state",
         )
 
-        return frozenset(event_id for event_id, in rows)
+        return frozenset(event_id for (event_id,) in rows)
 
     # FIXME: how should this be cached?
     @cancellable