--- zip30.orig/timezone.c	2004-11-13 09:35:12.000000000 +0100
+++ zip30/timezone.c	2025-10-05 03:57:25.603996335 +0200
@@ -41,6 +41,7 @@
 #include "timezone.h"
 #include <ctype.h>
 #include <errno.h>
+#include <time.h>
 
 #ifdef IZTZ_DEFINESTDGLOBALS
 long timezone = 0;