diff --git a/app/controllers/spree/users_controller.rb b/app/controllers/spree/users_controller.rb
index a591e20064..18effc349d 100644
--- a/app/controllers/spree/users_controller.rb
+++ b/app/controllers/spree/users_controller.rb
@@ -14,7 +14,7 @@ module Spree
 
     def show
       @payments_requiring_action = PaymentsRequiringAction.new(spree_current_user).query
-      @orders = orders_collection
+      @orders = orders_collection.includes(:line_items)
 
       customers = spree_current_user.customers
       @shops = Enterprise
diff --git a/app/serializers/api/order_serializer.rb b/app/serializers/api/order_serializer.rb
index f741675318..3123b973a9 100644
--- a/app/serializers/api/order_serializer.rb
+++ b/app/serializers/api/order_serializer.rb
@@ -22,7 +22,7 @@ module Api
     end
 
     def item_count
-      object.line_items.sum(:quantity)
+      object.line_items.sum(&:quantity)
     end
 
     def completed_at