From 73b6bf4629dbfa547a3e5d65395de2ed9c4c08c0 Mon Sep 17 00:00:00 2001
From: Erik Johnston <erik@matrix.org>
Date: Wed, 30 Mar 2016 15:09:18 +0100
Subject: [PATCH] Only forget room if you were in the room

---
 synapse/handlers/room.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py
index 1d4c2c39a..71f7ab3d2 100644
--- a/synapse/handlers/room.py
+++ b/synapse/handlers/room.py
@@ -946,7 +946,8 @@ class RoomMemberHandler(BaseHandler):
                 user_id, room_id
             ))
 
-        yield self.store.forget(user_id, room_id)
+        if membership:
+            yield self.store.forget(user_id, room_id)
 
 
 class RoomListHandler(BaseHandler):