diff --git a/synapse/federation/transport/server.py b/synapse/federation/transport/server.py
index 7838a8136..2bfe0f3c9 100644
--- a/synapse/federation/transport/server.py
+++ b/synapse/federation/transport/server.py
@@ -361,4 +361,5 @@ SERVLET_CLASSES = (
     FederationInviteServlet,
     FederationQueryAuthServlet,
     FederationGetMissingEventsServlet,
+    FederationEventAuthServlet,
 )