diff --git a/drivers/net/wireless/realtek/rtw89/phy.c b/drivers/net/wireless/realtek/rtw89/phy.c
index 118d09b3eadd..aa4fc9115995 100644
--- a/drivers/net/wireless/realtek/rtw89/phy.c
+++ b/drivers/net/wireless/realtek/rtw89/phy.c
@@ -341,8 +341,11 @@ static void rtw89_phy_ra_sta_update(struct rtw89_dev *rtwdev,
 
 		mode |= RTW89_RA_MODE_VHT;
 		csi_mode = RTW89_RA_RPT_MODE_VHT;
-		/* MCS9, MCS8, MCS7 */
-		ra_mask |= get_mcs_ra_mask(mcs_map, 9, 1);
+		/* MCS9 (non-20MHz), MCS8, MCS7 */
+		if (sta->deflink.bandwidth == IEEE80211_STA_RX_BW_20)
+			ra_mask |= get_mcs_ra_mask(mcs_map, 8, 1);
+		else
+			ra_mask |= get_mcs_ra_mask(mcs_map, 9, 1);
 		high_rate_masks = rtw89_ra_mask_vht_rates;
 		if (sta->deflink.vht_cap.cap & IEEE80211_VHT_CAP_RXSTBC_MASK)
 			stbc_en = 1;