diff --git a/drivers/tty/serial/mux.c b/drivers/tty/serial/mux.c
index 2bff69e70e4bc..a789837348259 100644
--- a/drivers/tty/serial/mux.c
+++ b/drivers/tty/serial/mux.c
@@ -576,8 +576,7 @@ static int __init mux_init(void)
 
 	if(port_cnt > 0) {
 		/* Start the Mux timer */
-		init_timer(&mux_timer);
-		mux_timer.function = mux_poll;
+		setup_timer(&mux_timer, mux_poll, 0UL);
 		mod_timer(&mux_timer, jiffies + MUX_POLL_DELAY);
 
 #ifdef CONFIG_SERIAL_MUX_CONSOLE