diff --git a/src/ndns-tlv.hpp b/src/ndns-tlv.hpp
new file mode 100644
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+++ b/src/ndns-tlv.hpp
@@ -0,0 +1,42 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014, Regents of the University of California.
+ *
+ * This file is part of NDNS (Named Data Networking Domain Name Service).
+ * See AUTHORS.md for complete list of NdnS authors and contributors.
+ *
+ * NdnS is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * NdnS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * NdnS, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef NDNS_NDNS_TLV_HPP
+#define NDNS_NDNS_TLV_HPP
+
+#include <ndn-cxx/encoding/tlv.hpp>
+
+namespace ndn {
+namespace ndns {
+namespace tlv {
+
+/**
+ * @brief the field defined in NDNS packet format
+ */
+enum {
+  NdnsType = 180, ///< Detailed Types are defined in NdnsType in ndns-enum.hpp
+  RrType = 190,
+  RrDataType = 191
+};
+
+} // namespace tlv
+} // namespace ndns
+} // namespace ndn
+
+#endif // NDNS_NDNS_TLV_HPP