$OpenBSD: patch-ui_gfx_codec_png_codec_cc,v 1.2 2012/08/26 18:47:01 robert Exp $
--- ui/gfx/codec/png_codec.cc.orig	Tue Aug 14 09:02:26 2012
+++ ui/gfx/codec/png_codec.cc	Wed Aug 15 23:14:39 2012
@@ -16,6 +16,7 @@
 extern "C" {
 #if defined(USE_SYSTEM_LIBPNG)
 #include <png.h>
+#include <zlib.h>
 #else
 #include "third_party/libpng/png.h"
 #endif
