// detail/type_traits.hpp
// ~~~~~~~~~~~~~~~~~~~~~~
//
-// Copyright (c) 2003-2019 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+// Copyright (c) 2003-2020 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under 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)
#if defined(BOOST_ASIO_HAS_STD_TYPE_TRAITS)
# include <type_traits>
-#else // defined(BOOST_ASIO_HAS_TYPE_TRAITS)
+#else // defined(BOOST_ASIO_HAS_STD_TYPE_TRAITS)
# include <boost/type_traits/add_const.hpp>
# include <boost/type_traits/conditional.hpp>
# include <boost/type_traits/decay.hpp>
# include <boost/utility/declval.hpp>
# include <boost/utility/enable_if.hpp>
# include <boost/utility/result_of.hpp>
-#endif // defined(BOOST_ASIO_HAS_TYPE_TRAITS)
+#endif // defined(BOOST_ASIO_HAS_STD_TYPE_TRAITS)
namespace boost {
namespace asio {