1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/federation/federation_client.py b/synapse/federation/federation_client.py
index b5e0b84cbc..17eff60909 100644
--- a/synapse/federation/federation_client.py
+++ b/synapse/federation/federation_client.py
@@ -618,7 +618,7 @@ class FederationClient(FederationBase):
         #
         # Dendrite returns a 404 (with a body of "404 page not found");
         # Conduit returns a 404 (with no body); and Synapse returns a 400
-        # with M_UNRECOGNISED.
+        # with M_UNRECOGNIZED.
         #
         # This needs to be rather specific as some endpoints truly do return 404
         # errors.