diff --git a/shadowsocks-csharp/Controller/System/AutoStartup.cs b/shadowsocks-csharp/Controller/System/AutoStartup.cs
index e2031788..310a3c71 100644
--- a/shadowsocks-csharp/Controller/System/AutoStartup.cs
+++ b/shadowsocks-csharp/Controller/System/AutoStartup.cs
@@ -118,6 +118,7 @@ namespace Shadowsocks.Controller
         [Flags]
         enum ApplicationRestartFlags
         {
+            RESTART_ALWAYS = 0,
             RESTART_NO_CRASH = 1,
             RESTART_NO_HANG = 2,
             RESTART_NO_PATCH = 4,