--- ./std_tuple/detail/category_of_impl.hpp	2013-04-20 09:40:14.245182758 -0500
+++ /tmp/category_of_impl.hpp	2013-04-20 09:40:53.834594175 -0500
@@ -4,8 +4,8 @@
     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)
 ==============================================================================*/
-#if !defined(BOOST_FUSION_CATEGORY_OF_IMPL_09272006_0726)
-#define BOOST_FUSION_CATEGORY_OF_IMPL_09272006_0726
+#if !defined(BOOST_FUSION_CATEGORY_OF_IMPL_04202013_0940)
+#define BOOST_FUSION_CATEGORY_OF_IMPL_04202013_0940
 
 namespace boost { namespace fusion
 {