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diff --git a/src/platformsupport/dbusmenu/qdbusmenuconnection.cpp b/src/platformsupport/dbusmenu/qdbusmenuconnection.cpp
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+++ b/src/platformsupport/dbusmenu/qdbusmenuconnection.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2015 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL21$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia. For licensing terms and
+** conditions see http://qt.digia.com/licensing. For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file. Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights. These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QT_NO_SYSTEMTRAYICON
+#include "qdbustrayicon_p.h"
+#endif
+#include "qdbusmenuconnection_p.h"
+#include "qdbusmenuadaptor_p.h"
+#include "qdbusplatformmenu_p.h"
+
+#include <QtDBus/QDBusMessage>
+#include <QtDBus/QDBusServiceWatcher>
+#include <QtDBus/QDBusConnectionInterface>
+#include <qdebug.h>
+#include <qcoreapplication.h>
+
+QT_BEGIN_NAMESPACE
+
+Q_DECLARE_LOGGING_CATEGORY(qLcMenu)
+
+const QString StatusNotifierWatcherService = QLatin1String("org.kde.StatusNotifierWatcher");
+const QString StatusNotifierWatcherPath = QLatin1String("/StatusNotifierWatcher");
+const QString StatusNotifierItemPath = QLatin1String("/StatusNotifierItem");
+const QString MenuBarPath = QLatin1String("/MenuBar");
+
+/*!
+    \class QDBusMenuConnection
+    \internal
+    A D-Bus connection which is used for both menu and tray icon services.
+    Connects to the session bus and registers with the respective watcher services.
+*/
+QDBusMenuConnection::QDBusMenuConnection(QObject *parent)
+    : QObject(parent)
+    , m_connection(QDBusConnection::sessionBus())
+    , m_dbusWatcher(new QDBusServiceWatcher(StatusNotifierWatcherService, m_connection, QDBusServiceWatcher::WatchForRegistration, this))
+    , m_watcherRegistered(false)
+{
+#ifndef QT_NO_SYSTEMTRAYICON
+    // Start monitoring if any known tray-related services are registered.
+    if (m_connection.interface()->isServiceRegistered(StatusNotifierWatcherService))
+        m_watcherRegistered = true;
+    else
+        qCDebug(qLcMenu) << "failed to find service" << StatusNotifierWatcherService;
+#endif
+}
+
+void QDBusMenuConnection::dbusError(const QDBusError &error)
+{
+    qWarning() << "QDBusTrayIcon encountered a D-Bus error:" << error;
+}
+
+#ifndef QT_NO_SYSTEMTRAYICON
+bool QDBusMenuConnection::registerTrayIcon(QDBusTrayIcon *item)
+{
+    bool success = connection().registerService(item->instanceId());
+    if (!success) {
+        qWarning() << "failed to register service" << item->instanceId();
+        return false;
+    }
+
+    success = connection().registerObject(StatusNotifierItemPath, item);
+    if (!success) {
+        unregisterTrayIcon(item);
+        qWarning() << "failed to register" << item->instanceId() << StatusNotifierItemPath;
+        return false;
+    }
+
+    if (item->menu()) {
+        success = connection().registerObject(MenuBarPath, item->menu());
+        if (!success) {
+            unregisterTrayIcon(item);
+            qWarning() << "failed to register" << item->instanceId() << MenuBarPath;
+            return false;
+        }
+    }
+
+    QDBusMessage registerMethod = QDBusMessage::createMethodCall(
+                StatusNotifierWatcherService, StatusNotifierWatcherPath, StatusNotifierWatcherService,
+                QLatin1String("RegisterStatusNotifierItem"));
+    registerMethod.setArguments(QVariantList() << item->instanceId());
+    success = m_connection.callWithCallback(registerMethod, this, SIGNAL(trayIconRegistered()), SLOT(dbusError(QDBusError)));
+
+    return success;
+}
+
+bool QDBusMenuConnection::unregisterTrayIcon(QDBusTrayIcon *item)
+{
+    connection().unregisterObject(MenuBarPath);
+    connection().unregisterObject(StatusNotifierItemPath);
+    bool success = connection().unregisterService(item->instanceId());
+    if (!success)
+        qWarning() << "failed to unregister service" << item->instanceId();
+    return success;
+}
+#endif // QT_NO_SYSTEMTRAYICON
+
+QT_END_NAMESPACE