diff --git a/ChangeLog b/ChangeLog
index d9f0980e..199a2496 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2010-01-07  Joerg Wunsch <j.gnu@uriah.heep.sax.de>
+
+	* buspirate.c: add $ Id $ line.
+
 2010-01-07  Joerg Wunsch <j.gnu@uriah.heep.sax.de>
 
 	Fix a few warnings that came up recently (some of them only triggered
diff --git a/buspirate.c b/buspirate.c
index 7138efab..ae6e81d7 100644
--- a/buspirate.c
+++ b/buspirate.c
@@ -33,6 +33,8 @@
  * Tested with BusPirate PTH, firmware version 2.1 programming ATmega328P
  */
 
+/* $Id$ */
+
 #include "ac_cfg.h"
 
 #include <stdio.h>