diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c
index 4c49f53afa3e..dfa38d7b9e3e 100644
--- a/drivers/tty/tty_ldisc.c
+++ b/drivers/tty/tty_ldisc.c
@@ -861,7 +861,7 @@ static struct ctl_table tty_table[] = {
 		.data		= &tty_ldisc_autoload,
 		.maxlen		= sizeof(tty_ldisc_autoload),
 		.mode		= 0644,
-		.proc_handler	= proc_dointvec,
+		.proc_handler	= proc_dointvec_minmax,
 		.extra1		= SYSCTL_ZERO,
 		.extra2		= SYSCTL_ONE,
 	},