diff -Nrup a/timezone/zic.c b/timezone/zic.c

--- a/timezone/zic.c	2013-07-19 07:25:11.726506479 -0600

+++ b/timezone/zic.c	2013-07-19 07:27:15.059083404 -0600

@@ -2473,14 +2473,12 @@ oadd(t1, t2)

 const long	t1;

 const long	t2;

 {

-	register long	t;

-

-	t = t1 + t2;

-	if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {

+	if (t1 < 0 ? t2 < LONG_MIN - t1 : LONG_MAX - t1 < t2) {

 		error(_("time overflow"));

 		exit(EXIT_FAILURE);

 	}

-	return t;

+

+	return t1 + t2;

 }

 static zic_t