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diff --git a/src/foundation/Qt3DSAllocatorCallback.h b/src/foundation/Qt3DSAllocatorCallback.h
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+/****************************************************************************
+**
+** Copyright (C) 2008-2012 NVIDIA Corporation.
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt 3D Studio.
+**
+** $QT_BEGIN_LICENSE:GPL$
+** 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 General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 or (at your option) 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.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-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QT3DS_FOUNDATION_QT3DS_ALLOCATOR_CALLBACK_H
+#define QT3DS_FOUNDATION_QT3DS_ALLOCATOR_CALLBACK_H
+
+/** \addtogroup foundation
+@{
+*/
+
+#include "foundation/Qt3DS.h"
+#ifndef QT3DS_DOXYGEN
+namespace qt3ds {
+#endif
+
+/**
+\brief Abstract base class for an application defined memory allocator that can be used by the NV
+library.
+
+\note The SDK state should not be modified from within any allocation/free function.
+
+<b>Threading:</b> All methods of this class should be thread safe as it can be called from the user
+thread
+or the physics processing thread(s).
+*/
+
+class NVAllocatorCallback
+{
+public:
+    /**
+    \brief destructor
+    */
+    virtual ~NVAllocatorCallback() {}
+
+    /**
+    \brief Allocates size bytes of memory, which must be 16-byte aligned.
+
+    This method should never return NULL.  If you run out of memory, then
+    you should terminate the app or take some other appropriate action.
+
+    <b>Threading:</b> This function should be thread safe as it can be called in the context of the
+    user thread
+    and physics processing thread(s).
+
+    \param size			Number of bytes to allocate.
+    \param typeName		Name of the datatype that is being allocated
+    \param filename		The source file which allocated the memory
+    \param line			The source line which allocated the memory
+    \return				The allocated block of memory.
+    */
+    virtual void *allocate(size_t size, const char *typeName, const char *filename, int line,
+                           int flags = 0) = 0;
+    virtual void *allocate(size_t size, const char *typeName, const char *filename, int line,
+                           size_t alignment, size_t alignmentOffset) = 0;
+
+    /**
+    \brief Frees memory previously allocated by allocate().
+
+    <b>Threading:</b> This function should be thread safe as it can be called in the context of the
+    user thread
+    and physics processing thread(s).
+
+    \param ptr Memory to free.
+    */
+    virtual void deallocate(void *ptr) = 0;
+};
+
+#ifndef QT3DS_DOXYGEN
+} // namespace qt3ds
+#endif
+
+/** @} */
+#endif