Index: rts/System/FileSystem/Archives/VirtualArchive.cpp
--- rts/System/FileSystem/Archives/VirtualArchive.cpp.orig
+++ rts/System/FileSystem/Archives/VirtualArchive.cpp
@@ -8,6 +8,7 @@
 
 #include "minizip/zip.h"
 #include <cassert>
+#include <zlib.h>
 
 CVirtualArchiveFactory* virtualArchiveFactory;
 
