diff --git a/drivers/tty/synclinkmp.c b/drivers/tty/synclinkmp.c
index 90da0c7..3f89685 100644
--- a/drivers/tty/synclinkmp.c
+++ b/drivers/tty/synclinkmp.c
@@ -1612,7 +1612,7 @@
 	dev_kfree_skb(skb);
 
 	/* save start time for transmit timeout detection */
-	dev->trans_start = jiffies;
+	netif_trans_update(dev);
 
 	/* start hardware transmitter if necessary */
 	spin_lock_irqsave(&info->lock,flags);
@@ -1668,7 +1668,7 @@
 	program_hw(info);
 
 	/* enable network layer transmit */
-	dev->trans_start = jiffies;
+	netif_trans_update(dev);
 	netif_start_queue(dev);
 
 	/* inform generic HDLC layer of current DCD status */