--- codec/convert.c.bak	2012-01-23 01:05:14.455791163 +0100
+++ codec/convert.c	2012-01-23 01:05:40.934377069 +0100
@@ -51,6 +51,8 @@
 #endif /* _WIN32 */
 #endif /* HAVE_LIBPNG */
 
+#include <zlib.h>
+
 #include "../libopenjpeg/openjpeg.h"
 #include "convert.h"