diff --git a/src/xpdev/xpbeep.c b/src/xpdev/xpbeep.c
index 22c0869ac5653f66df1beb8b873509e90b9de41c..70393def94f9297655606f0ce8d175fb65c75aa9 100644
--- a/src/xpdev/xpbeep.c
+++ b/src/xpdev/xpbeep.c
@@ -1,3 +1,5 @@
+/* $Id$ */
+
 /* standard headers */
 #include <math.h>
 
diff --git a/src/xpdev/xpbeep.h b/src/xpdev/xpbeep.h
index ce3d14a49ec8adc082735ee22566b99d07fbd6f6..d20ea7a1e15d31dfae34fab35123e4910146346b 100644
--- a/src/xpdev/xpbeep.h
+++ b/src/xpdev/xpbeep.h
@@ -1,3 +1,5 @@
+/* $Id$ */
+
 #ifndef _XPBEEP_H_
 #define _XPBEEP_H_