diff --git a/synapse/third_party_rules/access_rules.py b/synapse/third_party_rules/access_rules.py
index 096e23e149..fbd829cdd2 100644
--- a/synapse/third_party_rules/access_rules.py
+++ b/synapse/third_party_rules/access_rules.py
@@ -358,7 +358,6 @@ class RoomAccessRules(object):
 
         return existing_members, threepid_invite_tokens
 
-
     @staticmethod
     def _is_invite_from_threepid(invite, threepid_invite_token):
         """Checks whether the given invite follows the given 3PID invite.