$NetBSD$

--- files/zip/zip.h.orig	2003-09-20 17:02:02.000000000 +0200
+++ files/zip/zip.h
@@ -58,6 +58,10 @@ extern "C" {
 #include "zlib.h"
 #endif
 
+#ifndef OF
+#define OF(x)	x
+#endif
+
 #if defined(STRICTZIP) || defined(STRICTZIPUNZIP)
 /* like the STRICT of WIN32, we define a pointer that cannot be converted
     from (void*) without cast */