diff -u -r tz.old/difftime.c tz/difftime.c
--- tz.old/difftime.c	Fri Oct  5 01:01:13 2001
+++ tz/difftime.c	Tue Dec 18 18:58:59 2001
@@ -32,9 +32,9 @@
 	time_t	delta;
 	time_t	hibit;
 
-	if (sizeof time_t < sizeof double)
+	if (sizeof(time_t) < sizeof(double))
 		return (double) time1 - (double) time0;
-	if (sizeof time_t < sizeof long_double)
+	if (sizeof(time_t) < sizeof(long_double))
 		return (long_double) time1 - (long_double) time0;
 	if (time1 < time0)
 		return -difftime(time0, time1);
