diff --git a/helper/ccnb-parser/ccnb-parser-common.h b/helper/ccnb-parser/ccnb-parser-common.h
index 4e4eb12..847a6b8 100644
--- a/helper/ccnb-parser/ccnb-parser-common.h
+++ b/helper/ccnb-parser/ccnb-parser-common.h
@@ -168,6 +168,8 @@
   CCN_DTAG_StatusResponse = 112,
   CCN_DTAG_StatusCode = 113,
   CCN_DTAG_StatusText = 114,
+  NDN_DTAG_Nack = 115,
+  NDN_DTAG_Congested = 116,
   CCN_DTAG_SequenceNumber = 256,
   CCN_DTAG_CCNProtocolDataUnit = 17702112
 };