diff --git a/sys/netinet6/nd6.h b/sys/netinet6/nd6.h
index 3eea91abe216..30b1bb2be761 100644
--- a/sys/netinet6/nd6.h
+++ b/sys/netinet6/nd6.h
@@ -116,19 +116,7 @@ struct in6_nbrinfo {
 	int	expire;		/* lifetime for NDP state transition */
 };
 
-#define DRLSTSIZ 10
-#define PRLSTSIZ 10
-struct	in6_drlist {
-	char ifname[IFNAMSIZ];
-	struct {
-		struct	in6_addr rtaddr;
-		u_char	flags;
-		u_short	rtlifetime;
-		u_long	expire;
-		u_short if_index;
-	} defrouter[DRLSTSIZ];
-};
-
+/* Sysctls, shared with user space. */
 struct	in6_defrouter {
 	struct	sockaddr_in6 rtaddr;
 	u_char	flags;
@@ -137,40 +125,6 @@ struct	in6_defrouter {
 	u_short if_index;
 };
 
-#ifdef _KERNEL
-struct	in6_oprlist {
-	char ifname[IFNAMSIZ];
-	struct {
-		struct	in6_addr prefix;
-		struct prf_ra raflags;
-		u_char	prefixlen;
-		u_char	origin;
-		u_long vltime;
-		u_long pltime;
-		u_long expire;
-		u_short if_index;
-		u_short advrtrs; /* number of advertisement routers */
-		struct	in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */
-	} prefix[PRLSTSIZ];
-};
-#endif
-
-struct	in6_prlist {
-	char ifname[IFNAMSIZ];
-	struct {
-		struct	in6_addr prefix;
-		struct prf_ra raflags;
-		u_char	prefixlen;
-		u_char	origin;
-		u_int32_t vltime;
-		u_int32_t pltime;
-		time_t expire;
-		u_short if_index;
-		u_short advrtrs; /* number of advertisement routers */
-		struct	in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */
-	} prefix[PRLSTSIZ];
-};
-
 struct in6_prefix {
 	struct	sockaddr_in6 prefix;
 	struct prf_ra raflags;
@@ -292,32 +246,6 @@ struct nd_prefix {
 #define ndpr_raf_auto		ndpr_flags.autonomous
 #define ndpr_raf_router		ndpr_flags.router
 
-/*
- * Message format for use in obtaining information about prefixes
- * from inet6 sysctl function
- */
-struct inet6_ndpr_msghdr {
-	u_short	inpm_msglen;	/* to skip over non-understood messages */
-	u_char	inpm_version;	/* future binary compatibility */
-	u_char	inpm_type;	/* message type */
-	struct in6_addr inpm_prefix;
-	u_long	prm_vltim;
-	u_long	prm_pltime;
-	u_long	prm_expire;
-	u_long	prm_preferred;
-	struct in6_prflags prm_flags;
-	u_short	prm_index;	/* index for associated ifp */
-	u_char	prm_plen;	/* length of prefix in bits */
-};
-
-#define prm_raf_onlink		prm_flags.prf_ra.onlink
-#define prm_raf_auto		prm_flags.prf_ra.autonomous
-
-#define prm_statef_onlink	prm_flags.prf_state.onlink
-
-#define prm_rrf_decrvalid	prm_flags.prf_rr.decrvalid
-#define prm_rrf_decrprefd	prm_flags.prf_rr.decrprefd
-
 struct nd_pfxrouter {
 	LIST_ENTRY(nd_pfxrouter) pfr_entry;
 	struct nd_defrouter *router;