diff --git a/include/boost/beast/core/detail/work_guard.hpp b/include/boost/beast/core/detail/work_guard.hpp
index f3021782..341b7438 100644
--- a/include/boost/beast/core/detail/work_guard.hpp
+++ b/include/boost/beast/core/detail/work_guard.hpp
@@ -1,3 +1,12 @@
+//
+// Copyright (c) 2020 Richard Hodges (hodges.r@gmail.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_CORE_DETAIL_WORK_GUARD_HPP
 #define BOOST_BEAST_CORE_DETAIL_WORK_GUARD_HPP