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-rw-r--r--synapse/api/auth.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/api/auth.py b/synapse/api/auth.py
index cbf3ae0ca4..c4597c1757 100644
--- a/synapse/api/auth.py
+++ b/synapse/api/auth.py
@@ -155,7 +155,7 @@ class Auth(object):
             # Get room creation event:
             key = (RoomCreateEvent.TYPE, "", )
             create = event.old_state_events.get(key)
-            if event.prev_events[0][0] == create.event_id:
+            if create and event.prev_events[0][0] == create.event_id:
                 if create.content["creator"] == event.state_key:
                     return True