diff --git a/doc/src/sgml/ref/alter_domain.sgml b/doc/src/sgml/ref/alter_domain.sgml
index 7562267c0d2..4735d424059 100644
--- a/doc/src/sgml/ref/alter_domain.sgml
+++ b/doc/src/sgml/ref/alter_domain.sgml
@@ -1,5 +1,5 @@
@@ -192,25 +192,25 @@ ALTER DOMAIN domain
Usage
- To add a NOT NULL constraint to a column:
+ To add a NOT NULL constraint to a domain:
ALTER DOMAIN zipcode SET NOT NULL;
- To remove a NOT NULL constraint from a column:
+ To remove a NOT NULL constraint from a domain:
ALTER DOMAIN zipcode DROP NOT NULL;
- To add a check constraint to a table:
+ To add a check constraint to a domain:
ALTER DOMAIN zipcode ADD CONSTRAINT zipchk CHECK (char_length(VALUE) = 5);
- To remove a check constraint from a table and all its children:
+ To remove a check constraint from a domain:
ALTER DOMAIN zipcode DROP CONSTRAINT zipchk;