--- a/src/transparency_gui.cpp	Tue May 06 15:06:19 2008 +0000
+++ b/src/transparency_gui.cpp	Tue May 06 15:11:33 2008 +0000
@@ -1,5 +1,7 @@
 /* $Id$ */
 
+/** @file transparency_gui.cpp The transparency GUI. */
+
 #include "stdafx.h"
 #include "openttd.h"
 #include "gui.h"