1 files changed, 2 insertions, 0 deletions

diff --git a/sound.c b/sound.c
index eb45e177a..d8e63a09c 100644
--- a/sound.c
+++ b/sound.c
@@ -1,3 +1,5 @@
+/* $Id$ */
+
 #include "stdafx.h"
 #include "openttd.h"
 #include "functions.h"