diff --git a/docs/manual.sgml b/docs/manual.sgml
index 3ce768f8da3f08f5338fd7c529f4472424cad863..1e1f57c36eab1ab7411075678b05e32603bc178c 100644
--- a/docs/manual.sgml
+++ b/docs/manual.sgml
@@ -21,6 +21,7 @@
 <!ENTITY views-directedit SYSTEM "views_directedit.sgml">
 <!ENTITY featurelist SYSTEM "feature_list.sgml">
 <!ENTITY mousebuttons SYSTEM "mousebuttons.sgml">
+<!ENTITY validator SYSTEM "validator.sgml">
 <!ENTITY gettingjava SYSTEM "getting_java.sgml">
 <!ENTITY unixargs SYSTEM "unix_args.sgml">
 <!ENTITY jvmopts SYSTEM "jvm_options.sgml">