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diff --git a/src/plugins/avfoundation/camera/avfconfigurationlock.h b/src/plugins/avfoundation/camera/avfconfigurationlock.h
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+++ b/src/plugins/avfoundation/camera/avfconfigurationlock.h
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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 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 AVFCONFIGURATIONLOCK_H
+#define AVFCONFIGURATIONLOCK_H
+
+#include <QtCore/qglobal.h>
+#include <QtCore/qdebug.h>
+
+#include <AVFoundation/AVFoundation.h>
+
+@class AVCaptureDevice;
+
+QT_BEGIN_NAMESPACE
+
+class AVFConfigurationLock
+{
+public:
+    explicit AVFConfigurationLock(AVCaptureDevice *captureDevice)
+        : m_captureDevice(captureDevice),
+          m_locked(false)
+    {
+        Q_ASSERT(m_captureDevice);
+        NSError *error = nil;
+        m_locked = [m_captureDevice lockForConfiguration:&error];
+    }
+
+    ~AVFConfigurationLock()
+    {
+        if (m_locked)
+            [m_captureDevice unlockForConfiguration];
+    }
+
+    operator bool() const
+    {
+        return m_locked;
+    }
+
+private:
+    Q_DISABLE_COPY(AVFConfigurationLock)
+
+    AVCaptureDevice *m_captureDevice;
+    bool m_locked;
+};
+
+QT_END_NAMESPACE
+
+#endif