diff --git a/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh b/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
index 71b96aa425..29dd4de400 100644
--- a/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
+++ b/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
@@ -524,7 +524,7 @@ mac80211_setup_adhoc_htmode() {
 			[ "$auto_channel" -gt 0 ] && ibss_htmode="HT40+"
 		;;
 		VHT80)
-			ibss_htmode="80Mhz"
+			ibss_htmode="80MHZ"
 		;;
 		NONE|NOHT)
 			ibss_htmode="NOHT"