diff --git a/app/controllers/spree/orders_controller.rb b/app/controllers/spree/orders_controller.rb
index 51bacbb588..6876c63775 100644
--- a/app/controllers/spree/orders_controller.rb
+++ b/app/controllers/spree/orders_controller.rb
@@ -68,7 +68,7 @@ module Spree
         associate_user
 
         if @order.insufficient_stock_lines.present? || @unavailable_order_variants.present?
-          flash[:error] = t("spree.orders.error_flash_for_unavailable_items")
+          flash.now[:error] = t("spree.orders.error_flash_for_unavailable_items")
         end
       end
     end