diff --git a/docs/ref/models/constraints.txt b/docs/ref/models/constraints.txt
index 00e907a882..99520d9ffa 100644
--- a/docs/ref/models/constraints.txt
+++ b/docs/ref/models/constraints.txt
@@ -67,7 +67,8 @@ 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
 
@@ -97,7 +98,8 @@ 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