diff --git a/src/wormhole_transit_relay/server_state.py b/src/wormhole_transit_relay/server_state.py
index ae4ac2f..0dfed82 100644
--- a/src/wormhole_transit_relay/server_state.py
+++ b/src/wormhole_transit_relay/server_state.py
@@ -618,7 +618,7 @@ class TransitServerState(object):
     listening.upon(
         connection_made,
         enter=wait_relay,
-        outputs=[_remember_client],
+        outputs=[_remember_client],  # XXX need _forget_client ?
     )
     listening.upon(
         connection_lost,