--- /dev/null
+--- a/drivers/net/wireless/ath/ath9k/beacon.c
++++ b/drivers/net/wireless/ath/ath9k/beacon.c
+@@ -700,7 +700,7 @@ void ath_beacon_config(struct ath_softc
+ if (cur_conf->dtim_period == 0)
+ cur_conf->dtim_period = 1;
+
+- switch (iftype) {
++ switch (sc->sc_ah->opmode) {
+ case NL80211_IFTYPE_AP:
+ ath_beacon_config_ap(sc, cur_conf);
+ break;