diff --git a/include/ndnboost/iostreams/detail/codecvt_holder.hpp b/include/ndnboost/iostreams/detail/codecvt_holder.hpp
new file mode 100644
index 0000000..7b5e929
--- /dev/null
+++ b/include/ndnboost/iostreams/detail/codecvt_holder.hpp
@@ -0,0 +1,63 @@
+// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
+// (C) Copyright 2003-2007 Jonathan Turkanis
+// 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/iostreams for documentation.
+
+// Contains machinery for performing code conversion.
+
+#ifndef NDNBOOST_IOSTREAMS_DETAIL_CODECVT_HOLDER_HPP_INCLUDED
+#define NDNBOOST_IOSTREAMS_DETAIL_CODECVT_HOLDER_HPP_INCLUDED
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+#include <cwchar>            // mbstate_t.
+#include <locale>            // codecvt, locale.
+#include <ndnboost/config.hpp>  // HAS_MACRO_USE_FACET.
+#include <ndnboost/iostreams/detail/config/codecvt.hpp>
+
+namespace ndnboost { namespace iostreams { namespace detail {
+
+struct default_codecvt { 
+    typedef wchar_t         intern_type, from_type;
+    typedef char            extern_type, to_type;
+    typedef std::mbstate_t  state_type;
+};
+
+template<typename Codecvt>
+struct codecvt_holder {
+    typedef Codecvt codecvt_type;
+    const codecvt_type& get() const { return codecvt_; }
+    void imbue(const std::locale&) { }
+    Codecvt codecvt_;
+};
+
+template<>
+struct codecvt_holder<default_codecvt> {
+    typedef std::codecvt<wchar_t, char, std::mbstate_t> codecvt_type;
+    codecvt_holder() { reset_codecvt(); }
+    const codecvt_type& get() const { return *codecvt_; }
+    void imbue(const std::locale& loc) 
+    { 
+        loc_ = loc;
+        reset_codecvt();
+    }
+    void reset_codecvt()
+    {
+        using namespace std;
+        #ifndef NDNBOOST_HAS_MACRO_USE_FACET
+            codecvt_ = & use_facet< codecvt_type >(loc_);
+        #else
+            codecvt_ = & _USE(loc_, codecvt_type);
+        #endif
+    }
+    std::locale loc_; // Prevent codecvt_ from being freed.
+    const codecvt_type* codecvt_;
+};
+
+} } } // End namespaces detail, iostreams, boost.
+
+#endif // #ifndef NDNBOOST_IOSTREAMS_DETAIL_CODECVT_HOLDER_HPP_INCLUDED