diff --git a/doc/src/sgml/catalogs.sgml b/doc/src/sgml/catalogs.sgml
index c304262fdb..14aeed3076 100644
--- a/doc/src/sgml/catalogs.sgml
+++ b/doc/src/sgml/catalogs.sgml
@@ -2372,6 +2372,14 @@ SCRAM-SHA-256$<iteration count>:&l
triggers), list of the constrained columns
+
+ conincluding
+ int2[]
+ pg_attribute.attnum
+ List of the non-constrained columns which are included into
+ the same index as the constrained columns
+
+
confkeyint2[]