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diff --git a/boost/beast/core/detail/static_const.hpp b/boost/beast/core/detail/static_const.hpp
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+//
+// Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail 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)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+#ifndef BOOST_BEAST_DETAIL_STATIC_CONST_HPP
+#define BOOST_BEAST_DETAIL_STATIC_CONST_HPP
+
+/*  This is a derivative work, original copyright:
+
+    Copyright Eric Niebler 2013-present
+
+    Use, modification and distribution is 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)
+
+    Project home: https://github.com/ericniebler/range-v3
+*/
+
+namespace boost {
+namespace beast {
+namespace detail {
+
+template<typename T>
+struct static_const
+{
+    static constexpr T value {};
+};
+
+template<typename T>
+constexpr T static_const<T>::value;
+
+#define BOOST_BEAST_INLINE_VARIABLE(name, type) \
+    namespace \
+    { \
+        constexpr auto& name = \
+            ::boost::beast::detail::static_const<type>::value; \
+    }
+
+} // detail
+} // beast
+} // boost
+
+#endif