Index: head/sys/netinet/in.h
===================================================================
--- head/sys/netinet/in.h
+++ head/sys/netinet/in.h
@@ -169,7 +169,7 @@
 #define	IPPROTO_BLT		30		/* Bulk Data Transfer */
 #define	IPPROTO_NSP		31		/* Network Services */
 #define	IPPROTO_INP		32		/* Merit Internodal */
-#define	IPPROTO_SEP		33		/* Sequential Exchange */
+#define	IPPROTO_DCCP		33		/* Datagram Congestion Control Protocol */
 #define	IPPROTO_3PC		34		/* Third Party Connect */
 #define	IPPROTO_IDPR		35		/* InterDomain Policy Routing */
 #define	IPPROTO_XTP		36		/* XTP */