1 files changed, 2 insertions, 0 deletions

diff --git a/mixer.c b/mixer.c
index 2393eb9c0..d592bc2b5 100644
--- a/mixer.c
+++ b/mixer.c
@@ -1,3 +1,5 @@
+/* $Id$ */
+
 #include "stdafx.h"
 #include "openttd.h"
 #include "mixer.h"