diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
index 9487ad4812c5..8e88445102ab 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
@@ -918,9 +918,15 @@ mt7921_mac_write_txwi_80211(struct mt7921_dev *dev, __le32 *txwi,
 		txwi[3] |= cpu_to_le32(val);
 	}
 
-	val = FIELD_PREP(MT_TXD7_TYPE, fc_type) |
-	      FIELD_PREP(MT_TXD7_SUB_TYPE, fc_stype);
-	txwi[7] |= cpu_to_le32(val);
+	if (mt76_is_mmio(&dev->mt76)) {
+		val = FIELD_PREP(MT_TXD7_TYPE, fc_type) |
+		      FIELD_PREP(MT_TXD7_SUB_TYPE, fc_stype);
+		txwi[7] |= cpu_to_le32(val);
+	} else {
+		val = FIELD_PREP(MT_TXD8_L_TYPE, fc_type) |
+		      FIELD_PREP(MT_TXD8_L_SUB_TYPE, fc_stype);
+		txwi[8] |= cpu_to_le32(val);
+	}
 }
 
 void mt7921_mac_write_txwi(struct mt7921_dev *dev, __le32 *txwi,
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.h b/drivers/net/wireless/mediatek/mt76/mt7921/mac.h
index 544a1c33126a..12e1cf8abe6e 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mac.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mac.h
@@ -284,6 +284,9 @@ enum tx_mcu_port_q_idx {
 #define MT_TXD7_HW_AMSDU		BIT(10)
 #define MT_TXD7_TX_TIME			GENMASK(9, 0)
 
+#define MT_TXD8_L_TYPE			GENMASK(5, 4)
+#define MT_TXD8_L_SUB_TYPE		GENMASK(3, 0)
+
 #define MT_TX_RATE_STBC			BIT(13)
 #define MT_TX_RATE_NSS			GENMASK(12, 10)
 #define MT_TX_RATE_MODE			GENMASK(9, 6)