diff --git a/mt7915/mac.c b/mt7915/mac.c
index 08ec8ce3..abedd451 100644
--- a/mt7915/mac.c
+++ b/mt7915/mac.c
@@ -1568,7 +1568,6 @@ mt7915_mac_add_txs_skb(struct mt7915_dev *dev, struct mt76_wcid *wcid, int pid,
 		break;
 	case MT_PHY_TYPE_HT:
 	case MT_PHY_TYPE_HT_GF:
-		rate.mcs += (rate.nss - 1) * 8;
 		if (rate.mcs > 31)
 			goto out;