diff --git a/core/lib/spree/core/engine.rb b/core/lib/spree/core/engine.rb
index 91eb1bcee1f..07334ab95a3 100644
--- a/core/lib/spree/core/engine.rb
+++ b/core/lib/spree/core/engine.rb
@@ -73,7 +73,7 @@ class Engine < ::Rails::Engine
         ]
 
         app.config.spree.calculators.add_class('promotion_actions_create_quantity_adjustments')
-        app.config.spree.calculators.promotion_actions_create_item_adjustments = [
+        app.config.spree.calculators.promotion_actions_create_quantity_adjustments = [
           Spree::Calculator::PercentOnLineItem,
           Spree::Calculator::FlatRate
         ]