diff --git a/src/lp/tlv.hpp b/src/lp/tlv.hpp
index b07b793..3231660 100644
--- a/src/lp/tlv.hpp
+++ b/src/lp/tlv.hpp
@@ -17,8 +17,6 @@
  * <http://www.gnu.org/licenses/>.
  *
  * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
- *
- * @author Eric Newberry <enewberry@email.arizona.edu>
  */
 
 #ifndef NDN_CXX_LP_TLV_HPP
@@ -45,6 +43,28 @@
   IncomingFaceId = 817
 };
 
+enum {
+  /**
+   * \brief lower bound of 1-octet header field
+   */
+  HEADER1_MIN = 81,
+
+  /**
+   * \brief upper bound of 1-octet header field
+   */
+  HEADER1_MAX = 99,
+
+  /**
+   * \brief lower bound of 3-octet header field
+   */
+  HEADER3_MIN = 800,
+
+  /**
+   * \brief upper bound of 3-octet header field
+   */
+  HEADER3_MAX = 959
+};
+
 } // namespace tlv
 } // namespace lp
 } // namespace ndn