diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c
index 3a1a5e0ee93f..5fe0ca1457ca 100644
--- a/drivers/tty/moxa.c
+++ b/drivers/tty/moxa.c
@@ -2040,7 +2040,7 @@ static int moxa_get_serial_info(struct tty_struct *tty,
 	ss->line = info->port.tty->index,
 	ss->flags = info->port.flags,
 	ss->baud_base = 921600,
-	ss->close_delay = info->port.close_delay;
+	ss->close_delay = jiffies_to_msecs(info->port.close_delay) / 10;
 	mutex_unlock(&info->port.mutex);
 	return 0;
 }
@@ -2069,7 +2069,7 @@ static int moxa_set_serial_info(struct tty_struct *tty,
 			return -EPERM;
 		}
 	}
-	info->port.close_delay = ss->close_delay * HZ / 100;
+	info->port.close_delay = msecs_to_jiffies(ss->close_delay * 10);
 
 	MoxaSetFifo(info, ss->type == PORT_16550A);