diff --git a/shadowsocks-csharp/Controller/ShadowsocksController.cs b/shadowsocks-csharp/Controller/ShadowsocksController.cs
index 52c5235b..4faf95d4 100644
--- a/shadowsocks-csharp/Controller/ShadowsocksController.cs
+++ b/shadowsocks-csharp/Controller/ShadowsocksController.cs
@@ -483,6 +483,7 @@ namespace Shadowsocks.Controller
             _pacDaemon.PACFileChanged += PacDaemon_PACFileChanged;
             _pacDaemon.UserRuleFileChanged += PacDaemon_UserRuleFileChanged;
             _pacServer = _pacServer ?? new PACServer(_pacDaemon);
+            _pacServer.UpdatePACURL(_config); // So PACServer works when system proxy disabled.
 
             gfwListUpdater = gfwListUpdater ?? new GFWListUpdater();
             gfwListUpdater.UpdateCompleted += PacServer_PACUpdateCompleted;
diff --git a/shadowsocks-csharp/Controller/System/SystemProxy.cs b/shadowsocks-csharp/Controller/System/SystemProxy.cs
index e11342ab..fa7d6853 100644
--- a/shadowsocks-csharp/Controller/System/SystemProxy.cs
+++ b/shadowsocks-csharp/Controller/System/SystemProxy.cs
@@ -39,7 +39,7 @@ namespace Shadowsocks.Controller
                         }
                         else
                         {
-                            pacSrv.UpdatePACURL(config);
+
                             pacUrl = pacSrv.PacUrl;
                         }
                         Sysproxy.SetIEProxy(true, false, null, pacUrl);