Index: ieee80211_proto.h
===================================================================
--- ieee80211_proto.h	(revision 250408)
+++ ieee80211_proto.h	(working copy)
@@ -96,8 +96,13 @@
 		struct ieee80211_bpf_params *);
 int	ieee80211_raw_xmit(struct ieee80211_node *, struct mbuf *,
 		const struct ieee80211_bpf_params *);
+#if __FreeBSD_version >= 1000031
 int	ieee80211_output(struct ifnet *, struct mbuf *,
                const struct sockaddr *, struct route *ro);
+#else
+int	ieee80211_output(struct ifnet *, struct mbuf *,
+               struct sockaddr *, struct route *ro);
+#endif
 int	ieee80211_raw_output(struct ieee80211vap *, struct ieee80211_node *,
 		struct mbuf *, const struct ieee80211_bpf_params *);
 void	ieee80211_send_setup(struct ieee80211_node *, struct mbuf *, int, int,
Index: ieee80211_output.c
===================================================================
--- ieee80211_output.c	(revision 250408)
+++ ieee80211_output.c	(working copy)
@@ -448,9 +448,15 @@
  * connect bpf write calls to the 802.11 layer for injecting
  * raw 802.11 frames.
  */
+#if __FreeBSD_version >= 1000031
 int
 ieee80211_output(struct ifnet *ifp, struct mbuf *m,
 	const struct sockaddr *dst, struct route *ro)
+#else
+int
+ieee80211_output(struct ifnet *ifp, struct mbuf *m,
+	struct sockaddr *dst, struct route *ro)
+#endif
 {
 #define senderr(e) do { error = (e); goto bad;} while (0)
 	struct ieee80211_node *ni = NULL;
Index: ieee80211_var.h
===================================================================
--- ieee80211_var.h	(revision 250408)
+++ ieee80211_var.h	(working copy)
@@ -496,8 +496,13 @@
 	int			(*iv_newstate)(struct ieee80211vap *,
 				    enum ieee80211_state, int);
 	/* 802.3 output method for raw frame xmit */
+#if __FreeBSD_version >= 1000031
 	int			(*iv_output)(struct ifnet *, struct mbuf *,
 				    const struct sockaddr *, struct route *);
+#else
+	int			(*iv_output)(struct ifnet *, struct mbuf *,
+				    struct sockaddr *, struct route *);
+#endif
 	uint64_t		iv_spare[6];
 };
 MALLOC_DECLARE(M_80211_VAP);
Index: ieee80211.c
===================================================================
--- ieee80211.c	(revision 250408)
+++ ieee80211.c	(working copy)
@@ -241,9 +241,15 @@
 	return EACCES;		/* XXX EIO/EPERM? */
 }
 
+#if __FreeBSD_version >= 1000031
 static int
 null_output(struct ifnet *ifp, struct mbuf *m,
 	const struct sockaddr *dst, struct route *ro)
+#else
+static int
+null_output(struct ifnet *ifp, struct mbuf *m,
+	struct sockaddr *dst, struct route *ro)
+#endif
 {
 	if_printf(ifp, "discard raw packet\n");
 	return null_transmit(ifp, m);