diff --git a/doc/src/sgml/ref/merge.sgml b/doc/src/sgml/ref/merge.sgml
index 0ca3d26ff4..31ba7a841d 100644
--- a/doc/src/sgml/ref/merge.sgml
+++ b/doc/src/sgml/ref/merge.sgml
@@ -41,7 +41,7 @@ and merge_insert is
INSERT [( column_name [, ...] )]
[ OVERRIDING { SYSTEM | USER } VALUE ]
-{ VALUES ( { expression | DEFAULT } [, ...] ) | DEFAULT VALUES }
+{ VALUES ( { expression | DEFAULT } ) | DEFAULT VALUES }
and merge_update is
@@ -285,6 +285,7 @@ DELETE
INSERT actions cannot contain sub-selects.
+ Only one VALUES clause can be specified.
The VALUES clause can only refer to columns from
the source relation, since by definition there is no matching target row.