--- src/png_.h.orig	2003-01-17 01:49:05.000000000 +0100
+++ src/png_.h	2012-04-27 19:22:59.000000000 +0200
@@ -27,5 +27,6 @@
 #else
 #include "png.h"
 #endif
+#include "pngpriv.h"
 
 #endif /* png__INCLUDED */