diff --git a/drivers/net/wireless/ath9k/rc.c b/drivers/net/wireless/ath9k/rc.c
index 832735677a465740c6173208b0a1026e2df68c74..28d69da342cd50a7780be814de5beddb6e32c9b0 100644
--- a/drivers/net/wireless/ath9k/rc.c
+++ b/drivers/net/wireless/ath9k/rc.c
@@ -864,6 +864,8 @@ static void ath_rc_ratefind(struct ath_softc *sc,
 					  rate_table, nrix, 1, 0);
 		ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
 				       try_per_rate, nrix, 0);
+
+		tx_info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
 	} else {
 		try_per_rate = (ATH_11N_TXMAXTRY/4);
 		/* Set the choosen rate. No RTS for first series entry. */