diff --git a/docs/releases/2.0.txt b/docs/releases/2.0.txt
index 6a06929275..ad48cf5790 100644
--- a/docs/releases/2.0.txt
+++ b/docs/releases/2.0.txt
@@ -681,8 +681,9 @@ these features.
 
 * ``Field.rel`` and ``Field.remote_field.to`` are removed.
 
-* The ``on_delete`` argument for ``ForeignKey`` and ``OneToOneField`` are now
-  required.
+* The ``on_delete`` argument for ``ForeignKey`` and ``OneToOneField`` is now
+  required in models and migrations. Consider squashing migrations so that you
+  have less of them to update.
 
 * ``django.db.models.fields.add_lazy_relation()`` is removed.