diff --git a/drivers/usb/serial/aircable.c b/drivers/usb/serial/aircable.c
index 812275509137..8554c1a7b9fc 100644
--- a/drivers/usb/serial/aircable.c
+++ b/drivers/usb/serial/aircable.c
@@ -305,9 +305,7 @@ static int aircable_probe(struct usb_serial *serial,
 
 	for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
 		endpoint = &iface_desc->endpoint[i].desc;
-		if (((endpoint->bEndpointAddress & 0x80) == 0x00) &&
-			((endpoint->bmAttributes & 3) == 0x02)) {
-			/* we found our bulk out endpoint */
+		if (usb_endpoint_is_bulk_out(endpoint)) {
 			dbg("found bulk out on endpoint %d", i);
 			++num_bulk_out;
 		}