diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c b/drivers/net/wireless/ath/ath9k/hif_usb.c
index f317515d8bf374e4b56348af1cf16b98cd3accae..424aabb2c7302db2bc74d4ca52256ae61fcac222 100644
--- a/drivers/net/wireless/ath/ath9k/hif_usb.c
+++ b/drivers/net/wireless/ath/ath9k/hif_usb.c
@@ -981,7 +981,7 @@ static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev)
 		return -ENOMEM;
 
 	while (len) {
-		transfer = min_t(int, len, 4096);
+		transfer = min_t(size_t, len, 4096);
 		memcpy(buf, data, transfer);
 
 		err = usb_control_msg(hif_dev->udev,