diff --git a/sys/kern/tty.c b/sys/kern/tty.c
index 9c2be5d1823..b0a535cb67e 100644
--- a/sys/kern/tty.c
+++ b/sys/kern/tty.c
@@ -117,7 +117,7 @@ tty_watermarks(struct tty *tp)
 	size_t bs = 0;
 	int error;
 
-	/* Provide an input buffer for 0.2 seconds of data. */
+	/* Provide an input buffer for 2 seconds of data. */
 	if (tp->t_termios.c_cflag & CREAD)
 		bs = MIN(tp->t_termios.c_ispeed / 5, TTYBUF_MAX);
 	error = ttyinq_setsize(&tp->t_inq, tp, bs);
@@ -127,7 +127,7 @@ tty_watermarks(struct tty *tp)
 	/* Set low watermark at 10% (when 90% is available). */
 	tp->t_inlow = (ttyinq_getallocatedsize(&tp->t_inq) * 9) / 10;
 
-	/* Provide an output buffer for 0.2 seconds of data. */
+	/* Provide an output buffer for 2 seconds of data. */
 	bs = MIN(tp->t_termios.c_ospeed / 5, TTYBUF_MAX);
 	error = ttyoutq_setsize(&tp->t_outq, tp, bs);
 	if (error != 0)