--- a/src/tunnel_map.cpp	Thu Apr 19 14:48:10 2007 +0000
+++ b/src/tunnel_map.cpp	Tue Jun 12 11:56:35 2007 +0000
@@ -1,5 +1,7 @@
 /* $Id$ */
 
+/** @file tunnel_map.cpp */
+
 #include "stdafx.h"
 #include "openttd.h"
 #include "tile.h"