diff --git a/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh b/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
index 29100887e3..ec8c9f1471 100644
--- a/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
+++ b/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
@@ -112,6 +112,7 @@ mac80211_hostapd_setup_base() {
 						esac
 					;;
 				esac
+				[ "$auto_channel" -gt 0 ] && ht_capab="[HT40+]"
 			;;
 			*) ieee80211n= ;;
 		esac