diff --git a/sys/dev/ath/if_ath.c b/sys/dev/ath/if_ath.c
index 85e2b4e86ab..2ff1d1c9ce7 100644
--- a/sys/dev/ath/if_ath.c
+++ b/sys/dev/ath/if_ath.c
@@ -739,7 +739,7 @@ ath_attach(u_int16_t devid, struct ath_softc *sc)
 	 */
 	if (ath_hal_getcapability(ah, HAL_CAP_HT, 0, NULL) == HAL_OK &&
 	    (wmodes & (HAL_MODE_HT20 | HAL_MODE_HT40))) {
-		int rxs, txs;
+		uint32_t rxs, txs;
 
 		device_printf(sc->sc_dev, "[HT] enabling HT modes\n");
 
diff --git a/sys/dev/ath/if_athvar.h b/sys/dev/ath/if_athvar.h
index 703bb53bb41..b202c06a6c5 100644
--- a/sys/dev/ath/if_athvar.h
+++ b/sys/dev/ath/if_athvar.h
@@ -772,11 +772,11 @@ struct ath_softc {
 	u_int32_t		sc_avgtsfdeltap;/* TDMA slot adjust (+) */
 	u_int32_t		sc_avgtsfdeltam;/* TDMA slot adjust (-) */
 	uint16_t		*sc_eepromdata;	/* Local eeprom data, if AR9100 */
-	int			sc_txchainmask;	/* hardware TX chainmask */
-	int			sc_rxchainmask;	/* hardware RX chainmask */
-	int			sc_cur_txchainmask;	/* currently configured TX chainmask */
-	int			sc_cur_rxchainmask;	/* currently configured RX chainmask */
-	int			sc_rts_aggr_limit;	/* TX limit on RTS aggregates */
+	uint32_t		sc_txchainmask;	/* hardware TX chainmask */
+	uint32_t		sc_rxchainmask;	/* hardware RX chainmask */
+	uint32_t		sc_cur_txchainmask;	/* currently configured TX chainmask */
+	uint32_t		sc_cur_rxchainmask;	/* currently configured RX chainmask */
+	uint32_t		sc_rts_aggr_limit;	/* TX limit on RTS aggregates */
 	int			sc_aggr_limit;	/* TX limit on all aggregates */
 	int			sc_delim_min_pad;	/* Minimum delimiter count */