diff --git a/drivers/net/wireless/ath/ath9k/tx99.c b/drivers/net/wireless/ath/ath9k/tx99.c
index 6668197c277c4bb12b7813ec4ea57d31409cfd17..c65c37fe1014ab8a196bbc6a88151d96ed059ead 100644
--- a/drivers/net/wireless/ath/ath9k/tx99.c
+++ b/drivers/net/wireless/ath/ath9k/tx99.c
@@ -99,7 +99,7 @@ static int ath9k_tx99_init(struct ath_softc *sc)
 	struct ath_tx_control txctl;
 	int r;
 
-	if (sc->sc_flags & SC_OP_INVALID) {
+	if (test_bit(SC_OP_INVALID, &sc->sc_flags)) {
 		ath_err(common,
 			"driver is in invalid state unable to use TX99");
 		return -EINVAL;