1 files changed, 1 insertions, 0 deletions
diff --git a/synapse/federation/federation_server.py b/synapse/federation/federation_server.py
index bf67d0f574..ac0f2ccfb3 100644
--- a/synapse/federation/federation_server.py
+++ b/synapse/federation/federation_server.py
@@ -949,6 +949,7 @@ class FederationServer(FederationBase):
                 room_id, room_version
             )
             if not next:
+                await lock.release()
                 return
 
             origin, event = next