--- if_iwi.c.ORI        2009-12-07 16:17:46.000000000 +0100
+++ if_iwi.c    2009-12-07 16:20:10.000000000 +0100
@@ -1508,9 +1508,9 @@
                         * 802.11 layer.
                         * XXX try to roam, drop assoc only on much higher count
                         */
-                       if (le32toh(beacon->number) >= ic->ic_bmissthreshold) {
+                       if ((le32toh(beacon->number) & 0xFF) >= ic->ic_bmissthreshold) {
                                DPRINTF(("Beacon miss: %u >= %u\n",
-                                   le32toh(beacon->number),
+                                   le32toh(beacon->number) & 0xFF,
                                    ic->ic_bmissthreshold));
                                ieee80211_beacon_miss(ic);
                        }