diff --git a/drivers/tty/serial/timbuart.c b/drivers/tty/serial/timbuart.c
index bb19ed012def7..0859394a78cdf 100644
--- a/drivers/tty/serial/timbuart.c
+++ b/drivers/tty/serial/timbuart.c
@@ -101,8 +101,7 @@ static void timbuart_tx_chars(struct uart_port *port)
 		!uart_circ_empty(xmit)) {
 		iowrite8(xmit->buf[xmit->tail],
 			port->membase + TIMBUART_TXFIFO);
-		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
-		port->icount.tx++;
+		uart_xmit_advance(port, 1);
 	}
 
 	dev_dbg(port->dev,