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diff --git a/boost/circular_buffer/allocators.hpp b/boost/circular_buffer/allocators.hpp
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+// Copyright 2018 Glen Joseph Fernandes
+// (glenjofe@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)
+
+#ifndef BOOST_CIRCULAR_BUFFER_ALLOCATORS_HPP
+#define BOOST_CIRCULAR_BUFFER_ALLOCATORS_HPP
+
+#include <boost/config.hpp>
+#if defined(BOOST_NO_CXX11_ALLOCATOR)
+#define BOOST_CB_NO_CXX11_ALLOCATOR
+#elif defined(BOOST_LIBSTDCXX_VERSION) && (BOOST_LIBSTDCXX_VERSION < 40800)
+#define BOOST_CB_NO_CXX11_ALLOCATOR
+#endif
+#include <limits>
+#if !defined(BOOST_CB_NO_CXX11_ALLOCATOR)
+#include <memory>
+#else
+#include <new>
+#endif
+#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
+#include <utility>
+#endif
+
+namespace boost {
+namespace cb_details {
+
+#if !defined(BOOST_CB_NO_CXX11_ALLOCATOR)
+template<class A>
+struct allocator_traits
+    : std::allocator_traits<A> {
+    using typename std::allocator_traits<A>::value_type;
+    using typename std::allocator_traits<A>::size_type;
+
+    static size_type max_size(const A&) BOOST_NOEXCEPT {
+        return (std::numeric_limits<size_type>::max)() / sizeof(value_type);
+    }
+};
+#else
+template<class A>
+struct allocator_traits {
+    typedef typename A::value_type value_type;
+    typedef typename A::pointer pointer;
+    typedef typename A::const_pointer const_pointer;
+    typedef typename A::difference_type difference_type;
+    typedef typename A::size_type size_type;
+
+    static size_type max_size(const A&) BOOST_NOEXCEPT {
+        return (std::numeric_limits<size_type>::max)() / sizeof(value_type);
+    }
+
+#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
+#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
+    template<class U, class... Args>
+    static void construct(const A&, U* ptr, Args&&... args) {
+        ::new((void*)ptr) U(std::forward<Args>(args)...);
+    }
+#else
+    template<class U, class V>
+    static void construct(const A&, U* ptr, V&& value) {
+        ::new((void*)ptr) U(std::forward<V>(value));
+    }
+#endif
+#else
+    template<class U, class V>
+    static void construct(const A&, U* ptr, const V& value) {
+        ::new((void*)ptr) U(value);
+    }
+
+    template<class U, class V>
+    static void construct(const A&, U* ptr, V& value) {
+        ::new((void*)ptr) U(value);
+    }
+#endif
+
+    template<class U>
+    static void destroy(const A&, U* ptr) {
+        (void)ptr;
+        ptr->~U();
+    }
+};
+#endif
+
+} // cb_details
+} // boost
+
+#endif