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-rw-r--r--synapse/storage/events.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/synapse/storage/events.py b/synapse/storage/events.py
index 025a7fb6d9..f39c8c8461 100644
--- a/synapse/storage/events.py
+++ b/synapse/storage/events.py
@@ -705,9 +705,11 @@ class EventsStore(EventFederationStore, EventsWorkerStore, BackgroundUpdateStore
         }
 
         events_map = {ev.event_id: ev for ev, _ in events_context}
+        room_version = yield self.get_room_version(room_id)
+
         logger.debug("calling resolve_state_groups from preserve_events")
         res = yield self._state_resolution_handler.resolve_state_groups(
-            room_id, state_groups, events_map, get_events
+            room_id, room_version, state_groups, events_map, get_events
         )
 
         defer.returnValue((res.state, None))