diff --git a/websocket-sharp/Net/EndPointListener.cs b/websocket-sharp/Net/EndPointListener.cs
index 12a7bc0c..63a6c11b 100644
--- a/websocket-sharp/Net/EndPointListener.cs
+++ b/websocket-sharp/Net/EndPointListener.cs
@@ -101,7 +101,7 @@ namespace WebSocketSharp.Net
         if (cert == null)
           throw new ArgumentException ("No server certificate could be found.");
 
-        _secure = secure;
+        _secure = true;
         _sslConfig =
           new ServerSslConfiguration (
             cert,