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diff --git a/src/qml/qml/qqmlincubator.h b/src/qml/qml/qqmlincubator.h
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+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the QtQml 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 QQMLINCUBATOR_H
+#define QQMLINCUBATOR_H
+
+#include <QtQml/qtqmlglobal.h>
+#include <QtQml/qqmlerror.h>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+
+class QQmlEngine;
+
+class QQmlIncubatorPrivate;
+class Q_QML_EXPORT QQmlIncubator
+{
+    Q_DISABLE_COPY(QQmlIncubator)
+public:
+    enum IncubationMode {
+        Asynchronous,
+        AsynchronousIfNested,
+        Synchronous
+    };
+    enum Status { 
+        Null, 
+        Ready, 
+        Loading, 
+        Error 
+    };
+
+    QQmlIncubator(IncubationMode = Asynchronous);
+    virtual ~QQmlIncubator();
+
+    void clear();
+    void forceCompletion();
+
+    bool isNull() const;
+    bool isReady() const;
+    bool isError() const;
+    bool isLoading() const;
+
+    QList<QQmlError> errors() const;
+
+    IncubationMode incubationMode() const;
+
+    Status status() const;
+
+    QObject *object() const;
+
+protected:
+    virtual void statusChanged(Status);
+    virtual void setInitialState(QObject *);
+
+private:
+    friend class QQmlComponent;
+    friend class QQmlEnginePrivate;
+    friend class QQmlIncubatorPrivate;
+    QQmlIncubatorPrivate *d;
+};
+
+class QQmlEnginePrivate;
+class Q_QML_EXPORT QQmlIncubationController
+{
+    Q_DISABLE_COPY(QQmlIncubationController)
+public:
+    QQmlIncubationController();
+    virtual ~QQmlIncubationController();
+
+    QQmlEngine *engine() const;
+    int incubatingObjectCount() const;
+
+    void incubateFor(int msecs);
+    void incubateWhile(volatile bool *flag, int msecs=0);
+
+protected:
+    virtual void incubatingObjectCountChanged(int);
+
+private:
+    friend class QQmlEngine;
+    friend class QQmlEnginePrivate;
+    friend class QQmlIncubatorPrivate;
+    QQmlEnginePrivate *d;
+};
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // QQMLINCUBATOR_H