diff --git a/app/helpers/checkout_helper.rb b/app/helpers/checkout_helper.rb
index a8d7c78264..9f21588ee6 100644
--- a/app/helpers/checkout_helper.rb
+++ b/app/helpers/checkout_helper.rb
@@ -26,7 +26,7 @@ module CheckoutHelper
 
   def display_checkout_admin_and_handling_adjustments_total_for(order)
     adjustments = order.adjustments.eligible.where('originator_type = ? AND source_type != ? ', 'EnterpriseFee', 'Spree::LineItem')
-    Spree::Money.new adjustments.sum(&:amount), currency: order.currency
+    Spree::Money.new adjustments.sum(:amount), currency: order.currency
   end
 
   def checkout_line_item_adjustments(order)
@@ -34,7 +34,7 @@ module CheckoutHelper
   end
 
   def checkout_subtotal(order)
-    order.item_total + checkout_line_item_adjustments(order).sum(&:amount)
+    order.item_total + checkout_line_item_adjustments(order).sum(:amount)
   end
 
   def display_checkout_subtotal(order)