diff --git a/sys/netinet6/nd6.h b/sys/netinet6/nd6.h
index 2313bf841c8b..c44e7048b8cc 100644
--- a/sys/netinet6/nd6.h
+++ b/sys/netinet6/nd6.h
@@ -434,15 +434,12 @@ void nd6_dad_duplicated __P((struct ifaddr *));
 void nd6_rs_input __P((struct mbuf *, int, int));
 void nd6_ra_input __P((struct mbuf *, int, int));
 void prelist_del __P((struct nd_prefix *));
-void defrouter_addreq __P((struct nd_defrouter *));
 void defrouter_reset __P((void));
 void defrouter_select __P((void));
 void defrtrlist_del __P((struct nd_defrouter *));
 void prelist_remove __P((struct nd_prefix *));
 int nd6_prelist_add __P((struct nd_prefixctl *, struct nd_defrouter *,
 	struct nd_prefix **));
-int nd6_prefix_onlink __P((struct nd_prefix *));
-int nd6_prefix_offlink __P((struct nd_prefix *));
 void pfxlist_onlink_check __P((void));
 struct nd_defrouter *defrouter_lookup __P((struct in6_addr *, struct ifnet *));
 struct nd_prefix *nd6_prefix_lookup __P((struct nd_prefixctl *));
diff --git a/sys/netinet6/nd6_rtr.c b/sys/netinet6/nd6_rtr.c
index d42b6f2e2f36..6c729eb2ec36 100644
--- a/sys/netinet6/nd6_rtr.c
+++ b/sys/netinet6/nd6_rtr.c
@@ -84,6 +84,9 @@ static int in6_init_prefix_ltimes(struct nd_prefix *);
 static void in6_init_address_ltimes __P((struct nd_prefix *,
 	struct in6_addrlifetime *));
 
+static int nd6_prefix_onlink(struct nd_prefix *);
+static int nd6_prefix_offlink(struct nd_prefix *);
+
 static int rt6_deleteroute(struct radix_node *, void *);
 
 VNET_DECLARE(int, nd6_recalc_reachtm_interval);
@@ -465,7 +468,7 @@ nd6_rtmsg(int cmd, struct rtentry *rt)
 		ifa_free(ifa);
 }
 
-void
+static void
 defrouter_addreq(struct nd_defrouter *new)
 {
 	struct sockaddr_in6 def, mask, gate;
@@ -1537,7 +1540,7 @@ pfxlist_onlink_check()
 	}
 }
 
-int
+static int
 nd6_prefix_onlink(struct nd_prefix *pr)
 {
 	struct ifaddr *ifa;
@@ -1662,7 +1665,7 @@ nd6_prefix_onlink(struct nd_prefix *pr)
 	return (error);
 }
 
-int
+static int
 nd6_prefix_offlink(struct nd_prefix *pr)
 {
 	int error = 0;