diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index 959b3e4e90774faf1a44815b6c6b19df0fedc336..833f6e1e37213e359a628fbd8d82ec22b8a3afad 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -224,7 +224,7 @@ static void sierra_set_termios(struct usb_serial_port *port,
 			struct ktermios *old_termios)
 {
 	dbg("%s", __FUNCTION__);
-
+	tty_termios_copy_hw(port->tty->termios, old_termios);
 	sierra_send_setup(port);
 }