diff --git a/reference/solr/solrmodifiableparams/construct.xml b/reference/solr/solrmodifiableparams/construct.xml
index ffbcee6136..cf6d1531b4 100644
--- a/reference/solr/solrmodifiableparams/construct.xml
+++ b/reference/solr/solrmodifiableparams/construct.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-
+<!-- $Revision$ -->
 
 <refentry xml:id="solrmodifiableparams.construct" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  <refnamediv>