Add new module API for adding custom fields to events `unsigned` section (#16549)

1 files changed, 1 insertions, 1 deletions

diff --git a/synapse/rest/client/notifications.py b/synapse/rest/client/notifications.py

index e7fe1332e7..5688d8593d 100644
--- a/synapse/rest/client/notifications.py
+++ b/synapse/rest/client/notifications.py
@@ -87,7 +87,7 @@ class NotificationsServlet(RestServlet):
                 "actions": pa.actions,
                 "ts": pa.received_ts,
                 "event": (
-                    self._event_serializer.serialize_event(
+                    await self._event_serializer.serialize_event(
                         notif_events[pa.event_id],
                         now,
                         config=serialize_options,