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diff --git a/boost/fiber/detail/spinlock.hpp b/boost/fiber/detail/spinlock.hpp
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+
+//          Copyright Oliver Kowalke 2013.
+// 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)
+//
+//  based on boost::interprocess::sync::interprocess_spin::mutex
+
+#ifndef BOOST_FIBERS_SPINLOCK_H
+#define BOOST_FIBERS_SPINLOCK_H
+
+#include <mutex>
+
+#include <boost/fiber/detail/config.hpp>
+
+namespace boost {
+namespace fibers {
+namespace detail {
+
+struct non_spinlock {
+    constexpr non_spinlock() noexcept {}
+    void lock() noexcept {}
+    void unlock() noexcept {}
+};
+
+struct non_lock {
+    constexpr non_lock( non_spinlock) noexcept {}
+    void lock() noexcept {}
+    void unlock() noexcept {}
+};
+
+#if ! defined(BOOST_FIBERS_NO_ATOMICS) 
+typedef std::mutex      spinlock;
+using spinlock_lock = std::unique_lock< spinlock >;
+#else
+typedef non_spinlock    spinlock;
+using spinlock_lock = non_lock;
+#endif
+
+}}}
+
+#endif // BOOST_FIBERS_SPINLOCK_H