diff --git a/sys/netinet/in.h b/sys/netinet/in.h
index b66296cf7347..9f3b294cd42b 100644
--- a/sys/netinet/in.h
+++ b/sys/netinet/in.h
@@ -123,6 +123,7 @@ __END_DECLS
 #endif /* !_KERNEL && __BSD_VISIBLE */
 
 #if __POSIX_VISIBLE >= 200112
+#define	IPPROTO_IPV6		41		/* IP6 header */
 #define	IPPROTO_RAW		255		/* raw IP packet */
 #define	INET_ADDRSTRLEN		16
 #endif
@@ -174,7 +175,6 @@ __END_DECLS
 #define	IPPROTO_CMTP		38		/* Control Message Transport */
 #define	IPPROTO_TPXX		39		/* TP++ Transport */
 #define	IPPROTO_IL		40		/* IL transport protocol */
-#define	IPPROTO_IPV6		41		/* IP6 header */
 #define	IPPROTO_SDRP		42		/* Source Demand Routing */
 #define	IPPROTO_ROUTING		43		/* IP6 routing header */
 #define	IPPROTO_FRAGMENT	44		/* IP6 fragmentation header */