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diff --git a/src/corelib/thread/qatomic_bootstrap.h b/src/corelib/thread/qatomic_bootstrap.h
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+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Copyright (C) 2011 Thiago Macieira <thiago@kde.org>
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QATOMIC_BOOTSTRAP_H
+#define QATOMIC_BOOTSTRAP_H
+
+#include <QtCore/qgenericatomic.h>
+
+QT_BEGIN_NAMESPACE
+
+#if 0
+// silence syncqt warnings
+QT_END_NAMESPACE
+#pragma qt_sync_skip_header_check
+#pragma qt_sync_stop_processing
+#endif
+
+template <typename T> struct QAtomicOps: QGenericAtomicOps<QAtomicOps<T> >
+{
+    typedef T Type;
+
+    static bool ref(T &_q_value) Q_DECL_NOTHROW
+    {
+        return ++_q_value != 0;
+    }
+    static bool deref(T &_q_value) Q_DECL_NOTHROW
+    {
+        return --_q_value != 0;
+    }
+
+    static bool testAndSetRelaxed(T &_q_value, T expectedValue, T newValue, T *currentValue = 0) Q_DECL_NOTHROW
+    {
+        if (currentValue)
+            *currentValue = _q_value;
+        if (_q_value == expectedValue) {
+            _q_value = newValue;
+            return true;
+        }
+        return false;
+    }
+
+    static T fetchAndStoreRelaxed(T &_q_value, T newValue) Q_DECL_NOTHROW
+    {
+        T tmp = _q_value;
+        _q_value = newValue;
+        return tmp;
+    }
+
+    template <typename AdditiveType> static
+    T fetchAndAddRelaxed(T &_q_value, AdditiveType valueToAdd) Q_DECL_NOTHROW
+    {
+        T returnValue = _q_value;
+        _q_value += valueToAdd;
+        return returnValue;
+    }
+};
+
+QT_END_NAMESPACE
+
+#endif // QATOMIC_BOOTSTRAP_H