diff --git a/websocket-sharp/Server/HttpServer.cs b/websocket-sharp/Server/HttpServer.cs
index fb8ebdd4..9309e173 100644
--- a/websocket-sharp/Server/HttpServer.cs
+++ b/websocket-sharp/Server/HttpServer.cs
@@ -775,6 +775,61 @@ namespace WebSocketSharp.Server
       _receiveThread.Start ();
     }
 
+    private void stop (ushort code, string reason)
+    {
+      if (_state == ServerState.Ready) {
+        _log.Info ("The server is not started.");
+        return;
+      }
+
+      if (_state == ServerState.ShuttingDown) {
+        _log.Info ("The server is shutting down.");
+        return;
+      }
+
+      if (_state == ServerState.Stop) {
+        _log.Info ("The server has already stopped.");
+        return;
+      }
+
+      lock (_sync) {
+        if (_state == ServerState.ShuttingDown) {
+          _log.Info ("The server is shutting down.");
+          return;
+        }
+
+        if (_state == ServerState.Stop) {
+          _log.Info ("The server has already stopped.");
+          return;
+        }
+
+        _state = ServerState.ShuttingDown;
+      }
+
+      try {
+        var threw = false;
+        try {
+          _services.Stop (code, reason);
+        }
+        catch {
+          threw = true;
+          throw;
+        }
+        finally {
+          try {
+            stopReceiving (5000);
+          }
+          catch {
+            if (!threw)
+              throw;
+          }
+        }
+      }
+      finally {
+        _state = ServerState.Stop;
+      }
+    }
+
     private void stopReceiving (int millisecondsTimeout)
     {
       _listener.Close ();