diff --git a/db/migrate/20201227122327_add_included_to_adjustments.rb b/db/migrate/20201227122327_add_included_to_adjustments.rb
index 2aebc93706..2ccbeab2a3 100644
--- a/db/migrate/20201227122327_add_included_to_adjustments.rb
+++ b/db/migrate/20201227122327_add_included_to_adjustments.rb
@@ -1,4 +1,6 @@
 class AddIncludedToAdjustments < ActiveRecord::Migration
+  class Spree::TaxRate < ActiveRecord::Base; end
+
   class Spree::Adjustment < ActiveRecord::Base
     belongs_to :originator, polymorphic: true
   end