diff --git a/sys/netinet/in.h b/sys/netinet/in.h
--- a/sys/netinet/in.h
+++ b/sys/netinet/in.h
@@ -696,23 +696,6 @@
 #define	satosin(sa)	((struct sockaddr_in *)(sa))
 #define	sintosa(sin)	((struct sockaddr *)(sin))
 #define	ifatoia(ifa)	((struct in_ifaddr *)(ifa))
-
-typedef int	ipproto_input_t(struct mbuf **, int *, int);
-typedef void	ipproto_ctlinput_t(int, struct sockaddr *, void *);
-int	ipproto_register(uint8_t, ipproto_input_t, ipproto_ctlinput_t);
-int	ipproto_unregister(uint8_t);
-int	ip6proto_register(uint8_t, ipproto_input_t, ipproto_ctlinput_t);
-int	ip6proto_unregister(uint8_t);
-#define	IPPROTO_REGISTER(prot, input, ctl)	do {			\
-	int error __diagused;						\
-	error = ipproto_register(prot, input, ctl);			\
-	MPASS(error == 0);						\
-} while (0)
-#define	IP6PROTO_REGISTER(prot, input, ctl)	do {			\
-	int error __diagused;						\
-	error = ip6proto_register(prot, input, ctl);			\
-	MPASS(error == 0);						\
-} while (0)
 #endif /* _KERNEL */
 
 /* INET6 stuff */
diff --git a/sys/netinet/ip_var.h b/sys/netinet/ip_var.h
--- a/sys/netinet/ip_var.h
+++ b/sys/netinet/ip_var.h
@@ -239,6 +239,16 @@
 extern void	(*ip_rsvp_force_done)(struct socket *);
 extern int	(*rsvp_input_p)(struct mbuf **, int *, int);
 
+typedef int	ipproto_input_t(struct mbuf **, int *, int);
+typedef void	ipproto_ctlinput_t(int, struct sockaddr *, void *);
+int	ipproto_register(uint8_t, ipproto_input_t, ipproto_ctlinput_t);
+int	ipproto_unregister(uint8_t);
+#define	IPPROTO_REGISTER(prot, input, ctl)	do {			\
+	int error __diagused;						\
+	error = ipproto_register(prot, input, ctl);			\
+	MPASS(error == 0);						\
+} while (0)
+
 VNET_DECLARE(struct pfil_head *, inet_pfil_head);
 #define	V_inet_pfil_head	VNET(inet_pfil_head)
 #define	PFIL_INET_NAME		"inet"
diff --git a/sys/netinet6/ip6_input.c b/sys/netinet6/ip6_input.c
--- a/sys/netinet6/ip6_input.c
+++ b/sys/netinet6/ip6_input.c
@@ -131,9 +131,9 @@
 
 #include <netinet6/ip6protosw.h>
 
-ipproto_input_t		*ip6_protox[IPPROTO_MAX] = {
+ip6proto_input_t	*ip6_protox[IPPROTO_MAX] = {
 			    [0 ... IPPROTO_MAX - 1] = rip6_input };
-ipproto_ctlinput_t	*ip6_ctlprotox[IPPROTO_MAX] = {
+ip6proto_ctlinput_t	*ip6_ctlprotox[IPPROTO_MAX] = {
 			    [0 ... IPPROTO_MAX - 1] = rip6_ctlinput };
 
 VNET_DEFINE(struct in6_ifaddrhead, in6_ifaddrhead);
@@ -308,7 +308,8 @@
 SYSINIT(ip6_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, ip6_init, NULL);
 
 int
-ip6proto_register(uint8_t proto, ipproto_input_t input, ipproto_ctlinput_t ctl)
+ip6proto_register(uint8_t proto, ip6proto_input_t input,
+    ip6proto_ctlinput_t ctl)
 {
 
 	MPASS(proto > 0);
diff --git a/sys/netinet6/ip6_var.h b/sys/netinet6/ip6_var.h
--- a/sys/netinet6/ip6_var.h
+++ b/sys/netinet6/ip6_var.h
@@ -413,6 +413,16 @@
 u_int32_t ip6_randomid(void);
 u_int32_t ip6_randomflowlabel(void);
 void in6_delayed_cksum(struct mbuf *m, uint32_t plen, u_short offset);
+
+typedef int	ip6proto_input_t(struct mbuf **, int *, int);
+typedef void	ip6proto_ctlinput_t(int, struct sockaddr *, void *);
+int	ip6proto_register(uint8_t, ip6proto_input_t, ip6proto_ctlinput_t);
+int	ip6proto_unregister(uint8_t);
+#define	IP6PROTO_REGISTER(prot, input, ctl)	do {			\
+	int error __diagused;						\
+	error = ip6proto_register(prot, input, ctl);			\
+	MPASS(error == 0);						\
+} while (0)
 #endif /* _KERNEL */
 
 #endif /* !_NETINET6_IP6_VAR_H_ */