1 files changed, 4 insertions, 3 deletions
diff --git a/synapse/events/third_party_rules.py b/synapse/events/third_party_rules.py
index 86f7e5f8aa..459132d388 100644
--- a/synapse/events/third_party_rules.py
+++ b/synapse/events/third_party_rules.py
@@ -74,15 +74,16 @@ class ThirdPartyEventRules(object):
             is_requester_admin (bool): If the requester is an admin
 
         Returns:
-            defer.Deferred
+            defer.Deferred[bool]: Whether room creation is allowed or denied.
         """
 
         if self.third_party_rules is None:
-            return
+            return True
 
-        yield self.third_party_rules.on_create_room(
+        ret = yield self.third_party_rules.on_create_room(
             requester, config, is_requester_admin
         )
+        return ret
 
     @defer.inlineCallbacks
     def check_threepid_can_be_invited(self, medium, address, room_id):