diff --git a/reference/libevent/functions/event-buffer-set-callback.xml b/reference/libevent/functions/event-buffer-set-callback.xml
index 9e03915c02..29c7c81744 100644
--- a/reference/libevent/functions/event-buffer-set-callback.xml
+++ b/reference/libevent/functions/event-buffer-set-callback.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- $Revision: 297028 $ -->
+<!-- $Revision$ -->
 <refentry xml:id="function.event-buffer-new" xmlns="http://docbook.org/ns/docbook">
  <refnamediv>
   <refname>event_buffer_set_callback</refname>