diff --git a/mt76_connac_mcu.c b/mt76_connac_mcu.c
index 43631156..0a646ae5 100644
--- a/mt76_connac_mcu.c
+++ b/mt76_connac_mcu.c
@@ -2654,7 +2654,7 @@ EXPORT_SYMBOL_GPL(mt76_connac_mcu_bss_ext_tlv);
 int mt76_connac_mcu_bss_basic_tlv(struct sk_buff *skb,
 				  struct ieee80211_vif *vif,
 				  struct ieee80211_sta *sta,
-				  struct mt76_phy *phy, u8 wlan_idx,
+				  struct mt76_phy *phy, u16 wlan_idx,
 				  bool enable)
 {
 	struct mt76_vif *mvif = (struct mt76_vif *)vif->drv_priv;
diff --git a/mt76_connac_mcu.h b/mt76_connac_mcu.h
index 7b9d82dd..384c3eab 100644
--- a/mt76_connac_mcu.h
+++ b/mt76_connac_mcu.h
@@ -1642,7 +1642,7 @@ void mt76_connac_mcu_bss_omac_tlv(struct sk_buff *skb,
 int mt76_connac_mcu_bss_basic_tlv(struct sk_buff *skb,
 				  struct ieee80211_vif *vif,
 				  struct ieee80211_sta *sta,
-				  struct mt76_phy *phy, u8 wlan_idx,
+				  struct mt76_phy *phy, u16 wlan_idx,
 				  bool enable);
 void mt76_connac_mcu_sta_uapsd(struct sk_buff *skb, struct ieee80211_vif *vif,
 			       struct ieee80211_sta *sta);