diff --git a/shadowsocks-csharp/View/MenuViewController.cs b/shadowsocks-csharp/View/MenuViewController.cs
index 797e52f7..a22a8b05 100755
--- a/shadowsocks-csharp/View/MenuViewController.cs
+++ b/shadowsocks-csharp/View/MenuViewController.cs
@@ -231,7 +231,7 @@ namespace Shadowsocks.View
         {
             if (configForm != null)
             {
-                configForm.Focus();
+                configForm.Activate();
             }
             else
             {