diff --git a/src/lp/fields.hpp b/src/lp/fields.hpp
index ff9db28..7d898d0 100644
--- a/src/lp/fields.hpp
+++ b/src/lp/fields.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2013-2015 Regents of the University of California.
+ * Copyright (c) 2013-2016 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
@@ -68,6 +68,11 @@
                           tlv::IncomingFaceId> IncomingFaceIdField;
 BOOST_CONCEPT_ASSERT((Field<IncomingFaceIdField>));
 
+typedef detail::FieldDecl<field_location_tags::Header,
+                          uint64_t,
+                          tlv::CongestionMark> CongestionMarkField;
+BOOST_CONCEPT_ASSERT((Field<CongestionMarkField>));
+
 /**
  * The value of the wire encoded field is the data between the provided iterators. During
  * encoding, the data is copied from the Buffer into the wire buffer.
@@ -88,7 +93,8 @@
   NackField,
   NextHopFaceIdField,
   CachePolicyField,
-  IncomingFaceIdField
+  IncomingFaceIdField,
+  CongestionMarkField
   > FieldSet;
 
 } // namespace lp
diff --git a/src/lp/tags.hpp b/src/lp/tags.hpp
index c7fcefe..5e2b3d6 100644
--- a/src/lp/tags.hpp
+++ b/src/lp/tags.hpp
@@ -49,6 +49,13 @@
  */
 typedef SimpleTag<CachePolicy, 12> CachePolicyTag;
 
+/** \class CongestionMarkTag
+ *  \brief a packet tag for CongestionMark field
+ *
+ * This tag can be attached to Interest, Data, Nack.
+ */
+typedef SimpleTag<uint64_t, 13> CongestionMarkTag;
+
 } // namespace lp
 } // namespace ndn
 
diff --git a/src/lp/tlv.hpp b/src/lp/tlv.hpp
index 3231660..e7a5cca 100644
--- a/src/lp/tlv.hpp
+++ b/src/lp/tlv.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2013-2015 Regents of the University of California.
+ * Copyright (c) 2013-2016 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
@@ -40,7 +40,8 @@
   NextHopFaceId = 816,
   CachePolicy = 820,
   CachePolicyType = 821,
-  IncomingFaceId = 817
+  IncomingFaceId = 817,
+  CongestionMark = 832
 };
 
 enum {