diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 08c9181..6cb4f50 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -531,7 +531,7 @@
 	return set_control_lines(port->serial->dev, control);
 }
 
-static int pl2303_tiocmget(struct tty_struct *tty, struct file *file)
+static int pl2303_tiocmget(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
 	struct pl2303_private *priv = usb_get_serial_port_data(port);