diff --git a/websocket-sharp/Net/EndPointListener.cs b/websocket-sharp/Net/EndPointListener.cs
index 63a6c11b..67fa2639 100644
--- a/websocket-sharp/Net/EndPointListener.cs
+++ b/websocket-sharp/Net/EndPointListener.cs
@@ -102,16 +102,8 @@ namespace WebSocketSharp.Net
           throw new ArgumentException ("No server certificate could be found.");
 
         _secure = true;
-        _sslConfig =
-          new ServerSslConfiguration (
-            cert,
-            sslConfig.ClientCertificateRequired,
-            sslConfig.EnabledSslProtocols,
-            sslConfig.CheckCertificateRevocation
-          );
-
-        _sslConfig.ClientCertificateValidationCallback =
-          sslConfig.ClientCertificateValidationCallback;
+        _sslConfig = new ServerSslConfiguration (sslConfig);
+        _sslConfig.ServerCertificate = cert;
       }
 
       _endpoint = endpoint;