diff --git a/src/services/SyncServiceProvider.js b/src/services/SyncServiceProvider.js
index 757823640c9..cb4b6f1648c 100644
--- a/src/services/SyncServiceProvider.js
+++ b/src/services/SyncServiceProvider.js
@@ -38,11 +38,12 @@ export default function createSyncServiceProvider({ ydoc, syncService, fileId, i
 		throw new Error('fileId is required')
 	}
 	const WebSocketPolyfill = initWebSocketPolyfill(syncService, fileId, initialSession)
+	const disableBc = !!window?._oc_debug
 	const websocketProvider = new WebsocketProvider(
 		'ws://localhost:1234',
 		'file:' + fileId,
 		ydoc,
-		{ WebSocketPolyfill, disableBc: true },
+		{ WebSocketPolyfill, disableBc },
 	)
 	websocketProvider.on('status', event => logger.debug('status', event))
 	return websocketProvider