Index: head/sys/dev/wi/if_wi.c
===================================================================
--- head/sys/dev/wi/if_wi.c
+++ head/sys/dev/wi/if_wi.c
@@ -155,9 +155,12 @@
 static int  wi_read_rid(struct wi_softc *, int, void *, int *);
 static int  wi_write_rid(struct wi_softc *, int, const void *, int);
 static int  wi_write_appie(struct wi_softc *, int, const struct ieee80211_appie *);
+static u_int16_t wi_read_chanmask(struct wi_softc *);
 
 static void wi_scan_start(struct ieee80211com *);
 static void wi_scan_end(struct ieee80211com *);
+static void wi_getradiocaps(struct ieee80211com *, int, int *,
+		struct ieee80211_channel[]);
 static void wi_set_channel(struct ieee80211com *);
 	
 static __inline int
@@ -335,23 +338,9 @@
 	 * Query the card for available channels and setup the
 	 * channel table.  We assume these are all 11b channels.
 	 */
-	buflen = sizeof(val);
-	if (wi_read_rid(sc, WI_RID_CHANNEL_LIST, &val, &buflen) != 0)
-		val = htole16(0x1fff);	/* assume 1-13 */
-	KASSERT(val != 0, ("wi_attach: no available channels listed!"));
-
-	val <<= 1;			/* shift for base 1 indices */
-	for (i = 1; i < 16; i++) {
-		struct ieee80211_channel *c;
-
-		if (!isset((u_int8_t*)&val, i))
-			continue;
-		c = &ic->ic_channels[ic->ic_nchans++];
-		c->ic_freq = ieee80211_ieee2mhz(i, IEEE80211_CHAN_B);
-		c->ic_flags = IEEE80211_CHAN_B;
-		c->ic_ieee = i;
-		/* XXX txpowers? */
-	}
+	sc->sc_chanmask = wi_read_chanmask(sc);
+	wi_getradiocaps(ic, IEEE80211_CHAN_MAX, &ic->ic_nchans,
+	    ic->ic_channels);
 
 	/*
 	 * Set flags based on firmware version.
@@ -439,6 +428,7 @@
 	ic->ic_raw_xmit = wi_raw_xmit;
 	ic->ic_scan_start = wi_scan_start;
 	ic->ic_scan_end = wi_scan_end;
+	ic->ic_getradiocaps = wi_getradiocaps;
 	ic->ic_set_channel = wi_set_channel;
 	ic->ic_vap_create = wi_vap_create;
 	ic->ic_vap_delete = wi_vap_delete;
@@ -697,6 +687,26 @@
 }
 
 static void
+wi_getradiocaps(struct ieee80211com *ic,
+    int maxchans, int *nchans, struct ieee80211_channel chans[])
+{
+	struct wi_softc *sc = ic->ic_softc;
+	u_int8_t bands[IEEE80211_MODE_MAX];
+	int i;
+
+	memset(bands, 0, sizeof(bands));
+	setbit(bands, IEEE80211_MODE_11B);
+
+	for (i = 1; i < 16; i++) {
+		if (sc->sc_chanmask & (1 << i)) {
+			/* XXX txpowers? */
+			ieee80211_add_channel(chans, maxchans, nchans,
+			    i, 0, 0, 0, bands);
+		}
+	}
+}
+
+static void
 wi_set_channel(struct ieee80211com *ic)
 {
 	struct wi_softc *sc = ic->ic_softc;
@@ -1988,6 +1998,22 @@
 	return wi_write_rid(sc, rid, buf, ie->ie_len + sizeof(uint16_t));
 }
 
+static u_int16_t
+wi_read_chanmask(struct wi_softc *sc)
+{
+	u_int16_t val;
+	int buflen;
+
+	buflen = sizeof(val);
+	if (wi_read_rid(sc, WI_RID_CHANNEL_LIST, &val, &buflen) != 0)
+		val = htole16(0x1fff);	/* assume 1-13 */
+	KASSERT(val != 0, ("%s: no available channels listed!", __func__));
+
+	val <<= 1;			/* shift for base 1 indices */
+
+	return (val);
+}
+
 int
 wi_alloc(device_t dev, int rid)
 {
Index: head/sys/dev/wi/if_wivar.h
===================================================================
--- head/sys/dev/wi/if_wivar.h
+++ head/sys/dev/wi/if_wivar.h
@@ -114,6 +114,7 @@
 	u_int16_t		sc_portnum;
 	u_int16_t		sc_encryption;
 	u_int16_t		sc_monitor_port;
+	u_int16_t		sc_chanmask;
 
 	/* RSSI interpretation */
 	u_int16_t		sc_min_rssi;	/* clamp sc_min_rssi < RSSI */