diff --git a/ui/lib/ffi/entry/libpolaris_boot_browser.dart b/ui/lib/ffi/entry/libpolaris_boot_browser.dart
index 23b92eb..c784ad5 100644
--- a/ui/lib/ffi/entry/libpolaris_boot_browser.dart
+++ b/ui/lib/ffi/entry/libpolaris_boot_browser.dart
@@ -7,7 +7,7 @@ LibPolarisBoot create() {
 class LibpolarisBootBrowser implements LibPolarisBoot {
   @override
   Future<int> start(String cfg) async{
-    throw 0;
+    return 0;
   }
 
   @override