1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/federation/transport/server.py b/synapse/federation/transport/server.py
index 434718ddfc..cfd094e58f 100644
--- a/synapse/federation/transport/server.py
+++ b/synapse/federation/transport/server.py
@@ -144,7 +144,7 @@ class Authenticator:
         ):
             raise FederationDeniedError(origin)
 
-        if not json_request["signatures"]:
+        if origin is None or not json_request["signatures"]:
             raise NoAuthenticationError(
                 401, "Missing Authorization headers", Codes.UNAUTHORIZED
             )