1 files changed, 1 insertions, 2 deletions
diff --git a/synapse/event_auth.py b/synapse/event_auth.py
index 9863953f5c..c831d9f73c 100644
--- a/synapse/event_auth.py
+++ b/synapse/event_auth.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright 2014 - 2016 OpenMarket Ltd
 # Copyright 2020 The Matrix.org Foundation C.I.C.
 #
@@ -671,7 +670,7 @@ def _verify_third_party_invite(event: EventBase, auth_events: StateMap[EventBase
         public_key = public_key_object["public_key"]
         try:
             for server, signature_block in signed["signatures"].items():
-                for key_name, encoded_signature in signature_block.items():
+                for key_name in signature_block.keys():
                     if not key_name.startswith("ed25519:"):
                         continue
                     verify_key = decode_verify_key_bytes(