diff --git a/drivers/usb/serial/qcserial.c b/drivers/usb/serial/qcserial.c
index fd509ed6cf7065725c097ab1bc4eac84359be1f6..4ac137d070fbc55fef25556c52d2f9449a866dbc 100644
--- a/drivers/usb/serial/qcserial.c
+++ b/drivers/usb/serial/qcserial.c
@@ -454,6 +454,8 @@ static struct usb_serial_driver qcdevice = {
 	.write		     = usb_wwan_write,
 	.write_room	     = usb_wwan_write_room,
 	.chars_in_buffer     = usb_wwan_chars_in_buffer,
+	.tiocmget            = usb_wwan_tiocmget,
+	.tiocmset            = usb_wwan_tiocmset,
 	.attach              = qc_attach,
 	.release	     = qc_release,
 	.port_probe          = usb_wwan_port_probe,