diff --git a/drivers/usb/serial/visor.c b/drivers/usb/serial/visor.c
index 17fd8822d07f..eb76aaef4268 100644
--- a/drivers/usb/serial/visor.c
+++ b/drivers/usb/serial/visor.c
@@ -186,6 +186,7 @@ static struct usb_serial_driver handspring_device = {
 	.usb_driver =		&visor_driver,
 	.id_table =		id_table,
 	.num_ports =		2,
+	.bulk_out_size =	256,
 	.open =			visor_open,
 	.close =		visor_close,
 	.throttle =		usb_serial_generic_throttle,
@@ -206,6 +207,7 @@ static struct usb_serial_driver clie_5_device = {
 	.usb_driver =		&visor_driver,
 	.id_table =		clie_id_5_table,
 	.num_ports =		2,
+	.bulk_out_size =	256,
 	.open =			visor_open,
 	.close =		visor_close,
 	.throttle =		usb_serial_generic_throttle,
@@ -226,6 +228,7 @@ static struct usb_serial_driver clie_3_5_device = {
 	.usb_driver =		&visor_driver,
 	.id_table =		clie_id_3_5_table,
 	.num_ports =		1,
+	.bulk_out_size =	256,
 	.open =			visor_open,
 	.close =		visor_close,
 	.throttle =		usb_serial_generic_throttle,