diff --git a/drivers/net/wireless/ath9k/rc.c b/drivers/net/wireless/ath9k/rc.c
index 46172b5f492c618ff64f50634e239e772d1ffdac..8e1528d487b5cee14d2f45cda352bd12d5efb798 100644
--- a/drivers/net/wireless/ath9k/rc.c
+++ b/drivers/net/wireless/ath9k/rc.c
@@ -1358,7 +1358,9 @@ static void ath_rc_init(struct ath_softc *sc,
 	}
 
 	if (sta->ht_cap.ht_supported) {
-		ath_rc_priv->ht_cap = (WLAN_RC_HT_FLAG | WLAN_RC_DS_FLAG);
+		ath_rc_priv->ht_cap = WLAN_RC_HT_FLAG;
+		if (sc->sc_tx_chainmask != 1)
+			ath_rc_priv->ht_cap |= WLAN_RC_DS_FLAG;
 		if (sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)
 			ath_rc_priv->ht_cap |= WLAN_RC_40_FLAG;
 		if (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40)