--- zip.h.orig	2010-02-15 12:58:22.000000000 +0100
+++ zip.h	2014-05-24 09:56:28.285932357 +0200
@@ -311,6 +311,11 @@
   Write data in the zipfile
 */
 
+extern int ZEXPORT zipFlush OF((zipFile file));
+/*
+  Flush the zipfile output
+*/
+
 extern int ZEXPORT zipCloseFileInZip OF((zipFile file));
 /*
   Close the current file in the zipfile