diff --git a/include/ndnboost/iostreams/detail/access_control.hpp b/include/ndnboost/iostreams/detail/access_control.hpp
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+// (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 the definition of the class template access_control, which
+// allows the type of inheritance from a provided base class to be specified 
+// using a template parameter.
+
+
+#ifndef NDNBOOST_IOSTREAMS_ACCESS_CONTROL_HPP_INCLUDED
+#define NDNBOOST_IOSTREAMS_ACCESS_CONTROL_HPP_INCLUDED
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif              
+
+#include <ndnboost/iostreams/detail/select.hpp>
+#include <ndnboost/mpl/identity.hpp>
+#include <ndnboost/type_traits/is_same.hpp>
+
+namespace ndnboost { namespace iostreams {
+
+struct protected_ { };  // Represents protected inheritance.
+struct public_ { };     // Represents public inheritance.
+
+
+namespace detail {
+
+    // Implements protected inheritance.
+    template<typename U>
+    struct prot_ : protected U 
+    { 
+        prot_() { }
+        template<typename V> prot_(V v) : U(v) { }
+    };
+
+    // Implements public inheritance.
+    template<typename U> struct pub_ : public U { 
+        pub_() { }
+        template<typename V> pub_(V v) : U(v) { }
+    };
+
+//
+// Used to deduce the base type for the template access_control.
+//
+template<typename T, typename Access>
+struct access_control_base {
+    typedef int                                 bad_access_specifier;
+    typedef typename 
+            iostreams::select<  // Disambiguation for Tru64
+                ::ndnboost::is_same<
+                    Access, protected_
+                >,                              prot_<T>,
+                ::ndnboost::is_same<
+                    Access, public_
+                >,                              pub_<T>,
+                else_,                          bad_access_specifier
+            >::type                             type;
+};
+
+} // End namespace detail.
+
+//
+// Template name: access_control.
+// Description: Allows the type of inheritance from a provided base class
+//      to be specified using an int template parameter.
+// Template parameters:
+//      Base - The class from which to inherit (indirectly.)
+//      Access - The type of access desired. Must be one of the 
+//          values access_base::prot or access_base::pub.
+//
+template< typename T, typename Access,
+          typename Base = // VC6 workaraound (Compiler Error C2516)
+              typename detail::access_control_base<T, Access>::type >
+struct access_control : public Base { 
+    access_control() { }
+    template<typename U> explicit access_control(U u) : Base(u) { }
+};
+
+//----------------------------------------------------------------------------//
+
+} } // End namespaces iostreams, boost.
+
+#endif // #ifndef NDNBOOST_IOSTREAMS_ACCESS_CONTROL_HPP_INCLUDED