diff --git a/ndnboost/test/utils/assign_op.hpp b/ndnboost/test/utils/assign_op.hpp
new file mode 100644
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+++ b/ndnboost/test/utils/assign_op.hpp
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+//  (C) Copyright Gennadiy Rozental 2005-2008.
+//  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/test for the library home page.
+//
+//  File        : $RCSfile$
+//
+//  Version     : $Revision: 49312 $
+//
+//  Description : overloadable assignment
+// ***************************************************************************
+
+#ifndef BOOST_TEST_ASSIGN_OP_033005GER
+#define BOOST_TEST_ASSIGN_OP_033005GER
+
+namespace ndnboost {
+
+namespace unit_test {
+
+// ************************************************************************** //
+// **************             generic assign operator          ************** //
+// ************************************************************************** //
+
+// generic
+template<typename T,typename S>
+inline void
+assign_op( T& t, S const& s, long )
+{
+    t = s;
+}
+
+//____________________________________________________________________________//
+
+} // namespace unit_test
+
+} // namespace ndnboost
+
+#endif // BOOST_TEST_ASSIGN_OP_033005GER
+