diff --git a/docs/ref/models/constraints.txt b/docs/ref/models/constraints.txt
index f6d1842c14..1cb23e8080 100644
--- a/docs/ref/models/constraints.txt
+++ b/docs/ref/models/constraints.txt
@@ -65,7 +65,8 @@ ensures the age field is never less than 18.
 
 .. attribute:: CheckConstraint.name
 
-The name of the constraint.
+The name of the constraint. You must always specify a unique name for the
+constraint.
 
 .. versionchanged:: 3.0
 
@@ -95,7 +96,8 @@ date.
 
 .. attribute:: UniqueConstraint.name
 
-The name of the constraint.
+The name of the constraint. You must always specify a unique name for the
+constraint.
 
 .. versionchanged:: 3.0