diff --git a/include/boost/detail/allocator_utilities.hpp b/include/boost/detail/allocator_utilities.hpp
index 5a9a79e..91b0fa7 100644
--- a/include/boost/detail/allocator_utilities.hpp
+++ b/include/boost/detail/allocator_utilities.hpp
@@ -1,4 +1,4 @@
-/* Copyright 2003-2007 Joaquín M López Muñoz.
+/* Copyright 2003-2008 Joaquin M Lopez Munoz.
  * 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)
diff --git a/include/boost/detail/utf8_codecvt_facet.hpp b/include/boost/detail/utf8_codecvt_facet.hpp
index ac7e7bf..13c8346 100644
--- a/include/boost/detail/utf8_codecvt_facet.hpp
+++ b/include/boost/detail/utf8_codecvt_facet.hpp
@@ -79,25 +79,16 @@
 // specialized on those types for this to work.
 
 #include <locale>
-// for mbstate_t
-#include <wchar.h>
-// for std::size_t
-#include <cstddef>
+#include <cwchar>  // for mbstate_t
+#include <cstddef> // for std::size_t
 
 #include <boost/config.hpp>
 #include <boost/detail/workaround.hpp>
 
-namespace std {
-    #if defined(__LIBCOMO__)
-        using ::mbstate_t;
-    #elif defined(BOOST_DINKUMWARE_STDLIB) && !defined(__BORLANDC__)
-        using ::mbstate_t;
-    #elif defined(__SGI_STL_PORT)
-    #elif defined(BOOST_NO_STDC_NAMESPACE)
-        using ::mbstate_t;
-        using ::codecvt;
-    #endif
-} // namespace std
+#if defined(BOOST_NO_STDC_NAMESPACE)
+    using ::codecvt;
+    using ::mbstate_t;
+#endif
 
 #if !defined(__MSL_CPP__) && !defined(__LIBCOMO__)
     #define BOOST_CODECVT_DO_LENGTH_CONST const