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diff --git a/src/gui/opengl/qopengl_p.h b/src/gui/opengl/qopengl_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QOPENGL_P_H
+#define QOPENGL_P_H
+
+#include <qopengl.h>
+#include <private/qopenglcontext_p.h>
+
+#include <qthreadstorage.h>
+#include <qcache.h>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+class QOpenGLExtensionMatcher
+{
+public:
+    QOpenGLExtensionMatcher(const char *str);
+    QOpenGLExtensionMatcher();
+
+    bool match(const char *str) const {
+        int str_length = qstrlen(str);
+
+        Q_ASSERT(str);
+        Q_ASSERT(str_length > 0);
+        Q_ASSERT(str[str_length-1] != ' ');
+
+        for (int i = 0; i < m_offsets.size(); ++i) {
+            const char *extension = m_extensions.constData() + m_offsets.at(i);
+            if (qstrncmp(extension, str, str_length) == 0 && extension[str_length] == ' ')
+                return true;
+        }
+        return false;
+    }
+
+private:
+    void init(const char *str);
+
+    QByteArray m_extensions;
+    QVector<int> m_offsets;
+};
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // QOPENGL_H