1 files changed, 5 insertions, 1 deletions
diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py
index 05d1370c18..0cfced43d5 100644
--- a/synapse/handlers/message.py
+++ b/synapse/handlers/message.py
@@ -767,7 +767,8 @@ class EventCreationHandler(object):
             auth_events = {
                 (e.type, e.state_key): e for e in auth_events.values()
             }
-            if self.auth.check_redaction(event, auth_events=auth_events):
+            room_version = yield self.store.get_room_version(event.room_id)
+            if self.auth.check_redaction(room_version, event, auth_events=auth_events):
                 original_event = yield self.store.get_event(
                     event.redacts,
                     check_redacted=False,
@@ -781,6 +782,9 @@ class EventCreationHandler(object):
                         "You don't have permission to redact events"
                     )
 
+                # We've already checked.
+                event.internal_metadata.recheck_redaction = False
+
         if event.type == EventTypes.Create:
             prev_state_ids = yield context.get_prev_state_ids(self.store)
             if prev_state_ids: