diff --git a/websocket-sharp/Server/HttpServer.cs b/websocket-sharp/Server/HttpServer.cs
index 9dc0e2af..69f8a61e 100644
--- a/websocket-sharp/Server/HttpServer.cs
+++ b/websocket-sharp/Server/HttpServer.cs
@@ -563,7 +563,7 @@ namespace WebSocketSharp.Server
     }
 
     /// <summary>
-    /// Gets or sets the SSL configuration used to authenticate the server and
+    /// Gets the SSL configuration used to authenticate the server and
     /// optionally the client for secure connection.
     /// </summary>
     /// <value>
@@ -574,16 +574,6 @@ namespace WebSocketSharp.Server
       get {
         return _listener.SslConfiguration;
       }
-
-      set {
-        var msg = _state.CheckIfAvailable (true, false, false);
-        if (msg != null) {
-          _log.Error (msg);
-          return;
-        }
-
-        _listener.SslConfiguration = value;
-      }
     }
 
     /// <summary>