diff --git a/synapse/handlers/room_list.py b/synapse/handlers/room_list.py
index a2c0340a3c..70522e40fa 100644
--- a/synapse/handlers/room_list.py
+++ b/synapse/handlers/room_list.py
@@ -45,7 +45,7 @@ class RoomListHandler(BaseHandler):
         self.enable_room_list_search = hs.config.enable_room_list_search
 
         self.response_cache = ResponseCache(
-            hs, "room_list", timeout_ms=10 * 60 * 1000
+            hs, "room_list"
         )  # type: ResponseCache[Tuple[Optional[int], Optional[str], ThirdPartyInstanceID]]
         self.remote_response_cache = ResponseCache(
             hs, "remote_room_list", timeout_ms=30 * 1000