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diff --git a/include/oox/ole/olestorage.hxx b/include/oox/ole/olestorage.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_OOX_OLE_OLESTORAGE_HXX
+#define INCLUDED_OOX_OLE_OLESTORAGE_HXX
+
+#include <vector>
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <oox/dllapi.h>
+#include <oox/helper/storagebase.hxx>
+#include <rtl/ustring.hxx>
+
+namespace com::sun::star {
+    namespace container { class XNameContainer; }
+    namespace embed { class XStorage; }
+    namespace io { class XInputStream; }
+    namespace io { class XOutputStream; }
+    namespace io { class XStream; }
+    namespace uno { class XComponentContext; }
+}
+
+namespace oox::ole {
+
+
+/** Implements stream access for binary OLE storages. */
+class OOX_DLLPUBLIC OleStorage final : public StorageBase
+{
+public:
+    explicit            OleStorage(
+                            const css::uno::Reference< css::uno::XComponentContext >& rxContext,
+                            const css::uno::Reference< css::io::XInputStream >& rxInStream,
+                            bool bBaseStreamAccess );
+
+    explicit            OleStorage(
+                            const css::uno::Reference< css::uno::XComponentContext >& rxContext,
+                            const css::uno::Reference< css::io::XStream >& rxOutStream,
+                            bool bBaseStreamAccess );
+
+    virtual             ~OleStorage() override;
+
+private:
+    explicit            OleStorage(
+                            const OleStorage& rParentStorage,
+                            const css::uno::Reference< css::container::XNameContainer >& rxStorage,
+                            const OUString& rElementName,
+                            bool bReadOnly );
+    explicit            OleStorage(
+                            const OleStorage& rParentStorage,
+                            const css::uno::Reference< css::io::XStream >& rxOutStream,
+                            const OUString& rElementName );
+
+    /** Initializes the API storage object for input. */
+    void                initStorage( const css::uno::Reference< css::io::XInputStream >& rxInStream );
+    /** Initializes the API storage object for input/output. */
+    void                initStorage( const css::uno::Reference< css::io::XStream >& rxOutStream );
+
+    /** Returns true, if the object represents a valid storage. */
+    virtual bool        implIsStorage() const override;
+
+    /** Returns the com.sun.star.embed.XStorage interface of the current storage.
+
+        @attention
+            This function is not implemented for binary OLE storages.
+     */
+    virtual css::uno::Reference< css::embed::XStorage >
+                        implGetXStorage() const override;
+
+    /** Returns the names of all elements of this storage. */
+    virtual void        implGetElementNames( ::std::vector< OUString >& orElementNames ) const override;
+
+    /** Opens and returns the specified sub storage from the storage. */
+    virtual StorageRef  implOpenSubStorage( const OUString& rElementName, bool bCreateMissing ) override;
+
+    /** Opens and returns the specified input stream from the storage. */
+    virtual css::uno::Reference< css::io::XInputStream >
+                        implOpenInputStream( const OUString& rElementName ) override;
+
+    /** Opens and returns the specified output stream from the storage. */
+    virtual css::uno::Reference< css::io::XOutputStream >
+                        implOpenOutputStream( const OUString& rElementName ) override;
+
+    /** Commits the current storage. */
+    virtual void        implCommit() const override;
+
+private:
+    css::uno::Reference< css::uno::XComponentContext >
+                        mxContext;          ///< Component context with service manager.
+    css::uno::Reference< css::container::XNameContainer >
+                        mxStorage;          ///< Access to elements of this sub storage.
+    const OleStorage*   mpParentStorage;    ///< Parent OLE storage that contains this storage.
+};
+
+
+} // namespace oox::ole
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */