diff --git a/db/migrate/20141210233407_add_not_null_to_variant_override_relations.rb b/db/migrate/20141210233407_add_not_null_to_variant_override_relations.rb
index e10ab41953..b2f50167c9 100644
--- a/db/migrate/20141210233407_add_not_null_to_variant_override_relations.rb
+++ b/db/migrate/20141210233407_add_not_null_to_variant_override_relations.rb
@@ -1,6 +1,11 @@
 class AddNotNullToVariantOverrideRelations < ActiveRecord::Migration
-  def change
+  def up
     change_column :variant_overrides, :hub_id, :integer, null: false
     change_column :variant_overrides, :variant_id, :integer, null: false
   end
+
+  def down
+    change_column :variant_overrides, :hub_id, :integer, null: true
+    change_column :variant_overrides, :variant_id, :integer, null: true
+  end
 end