diff --git a/shadowsocks-csharp/View/ProxyForm.cs b/shadowsocks-csharp/View/ProxyForm.cs
index 88e711a1..f306c906 100644
--- a/shadowsocks-csharp/View/ProxyForm.cs
+++ b/shadowsocks-csharp/View/ProxyForm.cs
@@ -59,8 +59,8 @@ namespace Shadowsocks.View
 
         private void OKButton_Click(object sender, EventArgs e)
         {
-
-            if (_modifiedProxyConfig.useProxy == UseProxyCheckBox.Checked)
+            _modifiedProxyConfig.useProxy = UseProxyCheckBox.Checked;
+            if (_modifiedProxyConfig.useProxy)
             {
                 if (!int.TryParse(ProxyPortTextBox.Text, out _modifiedProxyConfig.proxyPort))
                 {