Include bind in ndnboost.
diff --git a/ndnboost/optional.hpp b/ndnboost/optional.hpp
new file mode 100644
index 0000000..0eeecbe
--- /dev/null
+++ b/ndnboost/optional.hpp
@@ -0,0 +1,18 @@
+// Copyright (C) 2003, Fernando Luis Cacciola Carballal.
+//
+// Use, modification, and distribution is subject to 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/optional for documentation.
+//
+// You are welcome to contact the author at:
+// fernando_cacciola@hotmail.com
+//
+#ifndef BOOST_OPTIONAL_FLC_19NOV2002_HPP
+#define BOOST_OPTIONAL_FLC_19NOV2002_HPP
+
+#include "ndnboost/optional/optional.hpp"
+
+#endif
+