diff --git a/drivers/isdn/gigaset/usb-gigaset.c b/drivers/isdn/gigaset/usb-gigaset.c
index d0a41cb0cf62..00d40773b07f 100644
--- a/drivers/isdn/gigaset/usb-gigaset.c
+++ b/drivers/isdn/gigaset/usb-gigaset.c
@@ -751,7 +751,7 @@ static int gigaset_probe(struct usb_interface *interface,
 	/* Fill the interrupt urb and send it to the core */
 	usb_fill_int_urb(ucs->read_urb, udev,
 			 usb_rcvintpipe(udev,
-					endpoint->bEndpointAddress & 0x0f),
+					usb_endpoint_num(endpoint)),
 			 ucs->rcvbuf, buffer_size,
 			 gigaset_read_int_callback,
 			 cs, endpoint->bInterval);