--- config/auto/ipv6/test.in.orig	Sun Jul  8 10:31:00 2012
+++ config/auto/ipv6/test.in	Sun Jul  8 10:31:18 2012
@@ -9,6 +9,7 @@ Copyright (C) 2010-2011, Parrot Foundation.
 #else
 #  include <sys/types.h>
 #  include <sys/socket.h>
+#  include <netinet/in.h>
 #  include <netdb.h>
 #endif