diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index 8fa8d8f435..386fd425b0 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -12904,6 +12904,11 @@ SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab;
simply produces a null result.
+
+ hypothetical-set aggregate
+ built-in
+
+
Each of the aggregates listed in
is associated with a