--- configure.orig	2005-12-20 22:35:03.000000000 +0100
+++ configure	2005-12-20 22:35:27.000000000 +0100
@@ -2578,7 +2578,7 @@
 
 trap 'rm -f $CONFIG_STATUS conftest*; exit 1' 1 2 15
 
-DEFS=-DHAVE_CONFIG_H
+DEFS="-DHAVE_CONFIG_H -DDNET_TUN_H"
 
 # Without the "./", some shells look in PATH for config.status.
 : ${CONFIG_STATUS=./config.status}
