1 files changed, 5 insertions, 0 deletions
diff --git a/synapse/federation/transport/server/federation.py b/synapse/federation/transport/server/federation.py
index 6f11138b57..205fd16daa 100644
--- a/synapse/federation/transport/server/federation.py
+++ b/synapse/federation/transport/server/federation.py
@@ -499,6 +499,11 @@ class FederationV2InviteServlet(BaseFederationServerServlet):
         result = await self.handler.on_invite_request(
             origin, event, room_version_id=room_version
         )
+
+        # We only store invite_room_state for internal use, so remove it before
+        # returning the event to the remote homeserver.
+        result["event"].get("unsigned", {}).pop("invite_room_state", None)
+
         return 200, result