1 files changed, 2 insertions, 0 deletions
diff --git a/synapse/storage/databases/main/event_federation.py b/synapse/storage/databases/main/event_federation.py
index e687f87eca..ca47a22bf1 100644
--- a/synapse/storage/databases/main/event_federation.py
+++ b/synapse/storage/databases/main/event_federation.py
@@ -48,6 +48,7 @@ from synapse.types import JsonDict
 from synapse.util import json_encoder
 from synapse.util.caches.descriptors import cached
 from synapse.util.caches.lrucache import LruCache
+from synapse.util.cancellation import cancellable
 from synapse.util.iterutils import batch_iter
 
 if TYPE_CHECKING:
@@ -976,6 +977,7 @@ class EventFederationWorkerStore(SignatureWorkerStore, EventsWorkerStore, SQLBas
 
         return int(min_depth) if min_depth is not None else None
 
+    @cancellable
     async def get_forward_extremities_for_room_at_stream_ordering(
         self, room_id: str, stream_ordering: int
     ) -> List[str]: