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diff --git a/src/gui/opengl/qopenglprogrambinarycache_p.h b/src/gui/opengl/qopenglprogrambinarycache_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtGui 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 QOPENGLPROGRAMBINARYCACHE_P_H
+#define QOPENGLPROGRAMBINARYCACHE_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtGui/qtguiglobal.h>
+#include <QtGui/qopenglshaderprogram.h>
+#include <QtCore/qcache.h>
+
+QT_BEGIN_NAMESPACE
+
+class QOpenGLProgramBinaryCache
+{
+public:
+    struct ShaderDesc {
+        ShaderDesc() { }
+        ShaderDesc(QOpenGLShader::ShaderType type, const QByteArray &source = QByteArray())
+          : type(type), source(source)
+        { }
+        QOpenGLShader::ShaderType type;
+        QByteArray source;
+    };
+    struct ProgramDesc {
+        QVector<ShaderDesc> shaders;
+    };
+
+    QOpenGLProgramBinaryCache();
+
+    bool load(const QByteArray &cacheKey, uint programId);
+    void save(const QByteArray &cacheKey, uint programId);
+
+private:
+    QString cacheFileName(const QByteArray &cacheKey) const;
+    bool verifyHeader(const QByteArray &buf) const;
+    bool setProgramBinary(uint programId, uint blobFormat, const void *p, uint blobSize);
+
+    QString m_cacheDir;
+    bool m_cacheWritable;
+    struct MemCacheEntry {
+        MemCacheEntry(const void *p, int size, uint format)
+          : blob(reinterpret_cast<const char *>(p), size),
+            format(format)
+        { }
+        QByteArray blob;
+        uint format;
+    };
+    QCache<QByteArray, MemCacheEntry> m_memCache;
+};
+
+QT_END_NAMESPACE
+
+#endif