diff --git a/time.c b/time.c
index 25b843e405..ef8a995da4 100644
--- a/time.c
+++ b/time.c
@@ -3365,12 +3365,12 @@ find_time_t(struct tm *tptr, int utc_p, time_t *tp)
 
     *tp = guess_lo +
           ((tptr->tm_year - tm_lo.tm_year) * 365 +
-           ((tptr->tm_year-69)/4) -
-           ((tptr->tm_year-1)/100) +
-           ((tptr->tm_year+299)/400) -
-           ((tm_lo.tm_year-69)/4) +
-           ((tm_lo.tm_year-1)/100) -
-           ((tm_lo.tm_year+299)/400) +
+           DIV((tptr->tm_year-69), 4) -
+           DIV((tptr->tm_year-1), 100) +
+           DIV((tptr->tm_year+299), 400) -
+           DIV((tm_lo.tm_year-69), 4) +
+           DIV((tm_lo.tm_year-1), 100) -
+           DIV((tm_lo.tm_year+299), 400) +
            tptr_tm_yday -
            tm_lo.tm_yday) * 86400 +
           (tptr->tm_hour - tm_lo.tm_hour) * 3600 +