Seems I can't "unforget" erroneously forgotten files, so will have to forget them and then re-add them
// Copyright (C) John Maddock 2005.
// Use, modification and distribution are subject to the Boost Software License,
// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt).
//
// See http://www.boost.org/libs/type_traits for most recent version including documentation.
#ifndef BOOST_TT_ALIGNED_STORAGE_HPP_INCLUDED
# define BOOST_TT_ALIGNED_STORAGE_HPP_INCLUDED
# include <boost/aligned_storage.hpp>
#endif // BOOST_TT_ALIGNED_STORAGE_HPP_INCLUDED