diff --git a/ndn-cpp/wire/ccnb.h b/ndn-cpp/wire/ccnb.h
index fc99bad..fdc1b57 100644
--- a/ndn-cpp/wire/ccnb.h
+++ b/ndn-cpp/wire/ccnb.h
@@ -142,7 +142,19 @@
     CCN_DTAG_StatusResponse = 112,
     CCN_DTAG_StatusCode = 113,
     CCN_DTAG_StatusText = 114,
-    CCN_DTAG_Nack = 200,
+    CCN_DTAG_SyncNode = 115,
+    CCN_DTAG_SyncNodeKind = 116,
+    CCN_DTAG_SyncNodeElement = 117,
+    CCN_DTAG_SyncVersion = 118,
+    CCN_DTAG_SyncNodeElements = 119,
+    CCN_DTAG_SyncContentHash = 120,
+    CCN_DTAG_SyncLeafCount = 121,
+    CCN_DTAG_SyncTreeDepth = 122,
+    CCN_DTAG_SyncByteCount = 123,
+    CCN_DTAG_SyncConfigSlice = 124,
+    CCN_DTAG_SyncConfigSliceList = 125,
+    CCN_DTAG_SyncConfigSliceOp = 126,
+    CCN_DTAG_SyncNodeDeltas = 127,
     CCN_DTAG_SequenceNumber = 256,
     CCN_DTAG_CCNProtocolDataUnit = 17702112
   };