diff --git a/src/vnet/sctp/sctp_packet.h b/src/vnet/sctp/sctp_packet.h
index b831d24..3ca05b5 100644
--- a/src/vnet/sctp/sctp_packet.h
+++ b/src/vnet/sctp/sctp_packet.h
@@ -163,7 +163,8 @@
   COOKIE_ACK,
   ECNE,
   CWR,
-  SHUTDOWN_COMPLETE
+  SHUTDOWN_COMPLETE,
+  UNKNOWN
 } sctp_chunk_type;
 
 /*