diff --git a/sys/netproto/802_11/wlan/ieee80211_scan_sta.c b/sys/netproto/802_11/wlan/ieee80211_scan_sta.c
--- a/sys/netproto/802_11/wlan/ieee80211_scan_sta.c
+++ b/sys/netproto/802_11/wlan/ieee80211_scan_sta.c
@@ -282,8 +282,8 @@
 	if (sp->ssid[1] != 0 &&
 	    (ISPROBE(subtype) || ise->se_ssid[1] == 0))
 		memcpy(ise->se_ssid, sp->ssid, 2+sp->ssid[1]);
-	KASSERT(sp->rates[1] <= IEEE80211_RATE_MAXSIZE,
-		("rate set too large: %u", sp->rates[1]));
+	if (sp->rates[1] > IEEE80211_RATE_MAXSIZE)
+		sp->rates[1] = IEEE80211_RATE_MAXSIZE;
 	memcpy(ise->se_rates, sp->rates, 2+sp->rates[1]);
 	if (sp->xrates != NULL) {
 		/* XXX validate xrates[1] */