diff --git a/sys/compat/netbsd32/netbsd32_ioctl.c b/sys/compat/netbsd32/netbsd32_ioctl.c
index 17bd10d10cae..d48be96a2c20 100644
--- a/sys/compat/netbsd32/netbsd32_ioctl.c
+++ b/sys/compat/netbsd32/netbsd32_ioctl.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: netbsd32_ioctl.c,v 1.53 2011/01/22 20:51:21 matt Exp $	*/
+/*	$NetBSD: netbsd32_ioctl.c,v 1.54 2011/02/01 00:53:22 matt Exp $	*/
 
 /*
  * Copyright (c) 1998, 2001 Matthew R. Green
@@ -31,7 +31,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: netbsd32_ioctl.c,v 1.53 2011/01/22 20:51:21 matt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: netbsd32_ioctl.c,v 1.54 2011/02/01 00:53:22 matt Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -85,6 +85,8 @@ static inline void netbsd32_to_oifreq(struct netbsd32_oifreq *, struct oifreq *,
 				       u_long cmd);
 static inline void netbsd32_to_ifreq(struct netbsd32_ifreq *, struct ifreq *,
 				       u_long cmd);
+static inline void netbsd32_to_if_addrprefreq(
+    const struct netbsd32_if_addrprefreq *, struct if_addrprefreq *, u_long);
 static inline void netbsd32_to_ifconf(struct netbsd32_ifconf *,
 					struct ifconf *, u_long);
 static inline void netbsd32_to_ifmediareq(struct netbsd32_ifmediareq *,
@@ -102,6 +104,9 @@ static inline void netbsd32_from_format_op(struct format_op *,
 					     struct netbsd32_format_op *,
 					     u_long);
 #endif
+static inline void netbsd32_from_if_addrprefreq(const struct if_addrprefreq *,
+					struct netbsd32_if_addrprefreq *,
+					u_long);
 static inline void netbsd32_from_ifreq(struct ifreq *,
                                          struct netbsd32_ifreq *, u_long);
 static inline void netbsd32_from_oifreq(struct oifreq *,
@@ -172,6 +177,16 @@ netbsd32_to_oifreq(struct netbsd32_oifreq *s32p, struct oifreq *p, u_long cmd)
 		p->ifr_data = (void *)NETBSD32PTR64(s32p->ifr_data);
 }
 
+static inline void
+netbsd32_to_if_addrprefreq(const struct netbsd32_if_addrprefreq *ifap32,
+	struct if_addrprefreq *ifap, u_long cmd)
+{
+	strlcpy(ifap->ifap_name, ifap32->ifap_name, sizeof(ifap->ifap_name));
+	ifap->ifap_preference = ifap32->ifap_preference;
+	memcpy(&ifap->ifap_addr, &ifap32->ifap_addr,
+	    max(ifap32->ifap_addr.ss_len, _SS_MAXSIZE));
+}
+
 static inline void
 netbsd32_to_ifconf(struct netbsd32_ifconf *s32p, struct ifconf *p, u_long cmd)
 {
@@ -321,6 +336,16 @@ netbsd32_from_oifreq(struct oifreq *p, struct netbsd32_oifreq *s32p, u_long cmd)
 		NETBSD32PTR32(s32p->ifr_data, p->ifr_data);
 }
 
+static inline void
+netbsd32_from_if_addrprefreq(const struct if_addrprefreq *ifap,
+	struct netbsd32_if_addrprefreq *ifap32, u_long cmd)
+{
+	strlcpy(ifap32->ifap_name, ifap->ifap_name, sizeof(ifap32->ifap_name));
+	ifap32->ifap_preference = ifap->ifap_preference;
+	memcpy(&ifap32->ifap_addr, &ifap->ifap_addr,
+	    max(ifap->ifap_addr.ss_len, _SS_MAXSIZE));
+}
+
 static inline void
 netbsd32_from_ifconf(struct ifconf *p, struct netbsd32_ifconf *s32p, u_long cmd)
 {
@@ -674,6 +699,12 @@ netbsd32_ioctl(struct lwp *l, const struct netbsd32_ioctl_args *uap, register_t
 	case SIOCSIFFLAGS32:
 		IOCTL_STRUCT_CONV_TO(SIOCSIFFLAGS, ifreq);
 
+	case SIOCGIFADDRPREF32:
+		IOCTL_STRUCT_CONV_TO(SIOCGIFADDRPREF, if_addrprefreq);
+	case SIOCSIFADDRPREF32:
+		IOCTL_STRUCT_CONV_TO(SIOCSIFADDRPREF, if_addrprefreq);
+
+
 	case OSIOCGIFFLAGS32:
 		IOCTL_STRUCT_CONV_TO(OSIOCGIFFLAGS, oifreq);
 	case OSIOCSIFFLAGS32:
diff --git a/sys/compat/netbsd32/netbsd32_ioctl.h b/sys/compat/netbsd32/netbsd32_ioctl.h
index 4faa9d7a5669..c7f6b04844f5 100644
--- a/sys/compat/netbsd32/netbsd32_ioctl.h
+++ b/sys/compat/netbsd32/netbsd32_ioctl.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: netbsd32_ioctl.h,v 1.29 2010/09/24 13:12:53 njoly Exp $	*/
+/*	$NetBSD: netbsd32_ioctl.h,v 1.30 2011/02/01 00:53:22 matt Exp $	*/
 
 /*
  * Copyright (c) 1998, 2001 Matthew R. Green
@@ -208,6 +208,19 @@ struct	netbsd32_ifreq {
 		} ifru_b;
 	} ifr_ifru;
 };
+
+struct netbsd32_if_addrprefreq {
+	char			ifap_name[IFNAMSIZ];
+	uint16_t		ifap_preference;
+	struct {
+		__uint8_t	ss_len;         /* address length */
+		sa_family_t	ss_family;      /* address family */
+		char		__ss_pad1[_SS_PAD1SIZE];
+		__int32_t	__ss_align[2];
+		char		__ss_pad2[_SS_PAD2SIZE];
+	} ifap_addr;
+};
+
 /* from <dev/pci/if_devar.h> */
 #define	SIOCGADDRROM32		_IOW('i', 240, struct netbsd32_ifreq)	/* get 128 bytes of ROM */
 #define	SIOCGCHIPID32		_IOWR('i', 241, struct netbsd32_ifreq)	/* get chipid */
@@ -257,6 +270,9 @@ struct	netbsd32_ifreq {
 #define	SIOCDIFADDR32	 _IOW('i', 25, struct netbsd32_ifreq)	/* delete IF addr */
 #define	OSIOCDIFADDR32	 _IOW('i', 25, struct netbsd32_oifreq)	/* delete IF addr */
 
+#define SIOCSIFADDRPREF32	 _IOW('i', 31, struct netbsd32_if_addrprefreq)
+#define SIOCGIFADDRPREF32	_IOWR('i', 32, struct netbsd32_if_addrprefreq)
+
 #define	SIOCADDMULTI32	 _IOW('i', 49, struct netbsd32_ifreq)	/* add m'cast addr */
 #define	OSIOCADDMULTI32	 _IOW('i', 49, struct netbsd32_oifreq)	/* add m'cast addr */