diff --git a/drivers/tty/synclinkmp.c b/drivers/tty/synclinkmp.c
index ce08c5ec331cc..0ca738f61a35b 100644
--- a/drivers/tty/synclinkmp.c
+++ b/drivers/tty/synclinkmp.c
@@ -1803,6 +1803,7 @@ static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 /**
  * hdlcdev_tx_timeout - called by network layer when transmit timeout is detected
  * @dev: pointer to network device structure
+ * @txqueue: unused
  */
 static void hdlcdev_tx_timeout(struct net_device *dev, unsigned int txqueue)
 {