diff --git a/doc/src/sgml/ref/vacuum.sgml b/doc/src/sgml/ref/vacuum.sgml
index bc5d7e7d5b..726acae47d 100644
--- a/doc/src/sgml/ref/vacuum.sgml
+++ b/doc/src/sgml/ref/vacuum.sgml
@@ -1,6 +1,6 @@
 <REFENTRY ID="SQL-VACUUM-1">
 <REFMETA>
-<REFENTRYTITLE>
+<REFENTRYTITLE id="vacuum">
 VACUUM
 </REFENTRYTITLE>
 <REFMISCINFO>SQL - Language Statements</REFMISCINFO>