diff --git a/drivers/usb/serial/visor.c b/drivers/usb/serial/visor.c
index 3f943f877ac2..8b4429e4a73c 100644
--- a/drivers/usb/serial/visor.c
+++ b/drivers/usb/serial/visor.c
@@ -197,7 +197,6 @@ static struct usb_serial_driver clie_5_device = {
 	.unthrottle =		usb_serial_generic_unthrottle,
 	.attach =		clie_5_attach,
 	.probe =		visor_probe,
-	.calc_num_ports =	visor_calc_num_ports,
 	.read_int_callback =	visor_read_int_callback,
 };