diff --git a/src/types/matrix/room.ts b/src/types/matrix/room.ts
index 82b5451f..f0927b3c 100644
--- a/src/types/matrix/room.ts
+++ b/src/types/matrix/room.ts
@@ -71,7 +71,7 @@ export type IRoomCreateContent = {
   room_version: string;
   type?: string;
   predecessor?: {
-    event_id: string;
+    event_id?: string;
     room_id: string;
   };
 };