diff --git a/app/views/order_items/_order_item.html.erb b/app/views/order_items/_order_item.html.erb
index e7f2965..a70559f 100644
--- a/app/views/order_items/_order_item.html.erb
+++ b/app/views/order_items/_order_item.html.erb
@@ -1,5 +1,5 @@
 <div class="col-md-3 form_products">
-  <div class="thumbnail<%= product.stock ==0 ? ' out-of-stock' : '' %>">
+  <div class="thumbnail<%= ' out-of-stock' if product.stock.zero? %>">
     <div class="form_row center">
       <div class="form_row_image">
         <%= image_tag product.avatar %>