--- /dev/null
+/* Copyright 2003-2005 Joaquín M López Muñoz.
+ * 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)
+ *
+ * See http://www.boost.org/libs/multi_index for library home page.
+ */
+
+#ifndef BOOST_MULTI_INDEX_DETAIL_INVARIANT_ASSERT_HPP
+#define BOOST_MULTI_INDEX_DETAIL_INVARIANT_ASSERT_HPP
+
+#if defined(_MSC_VER)&&(_MSC_VER>=1200)
+#pragma once
+#endif
+
+#if !defined(BOOST_MULTI_INDEX_INVARIANT_ASSERT)
+#include <boost/assert.hpp>
+#define BOOST_MULTI_INDEX_INVARIANT_ASSERT BOOST_ASSERT
+#endif
+
+#endif