--- port/cpl_minizip_ioapi.h.orig	2011-09-25 13:38:22.000000000 -0700
+++ port/cpl_minizip_ioapi.h	2011-09-25 13:39:22.000000000 -0700
@@ -41,6 +41,10 @@
 #endif
 #endif
 
+#ifndef OF
+#define OF(x) x
+#endif
+
 #ifdef __cplusplus
 extern "C" {
 #endif