diff --git a/src/sliding-sync.ts b/src/sliding-sync.ts
index 494cfb505..947ac85d1 100644
--- a/src/sliding-sync.ts
+++ b/src/sliding-sync.ts
@@ -33,6 +33,7 @@ const BUFFER_PERIOD_MS = 10 * 1000;
 export interface MSC3575RoomSubscription {
     required_state?: string[][];
     timeline_limit?: number;
+    include_old_rooms?: MSC3575RoomSubscription;
 }
 
 /**
@@ -42,7 +43,6 @@ export interface MSC3575Filter {
     is_dm?: boolean;
     is_encrypted?: boolean;
     is_invite?: boolean;
-    is_tombstoned?: boolean;
     room_name_like?: string;
     room_types?: string[];
     not_room_types?: string[];