diff --git a/templates/frontOffice/default/product.html b/templates/frontOffice/default/product.html
index eaea6b7b4..a5d2d1fdc 100755
--- a/templates/frontOffice/default/product.html
+++ b/templates/frontOffice/default/product.html
@@ -27,7 +27,7 @@
                 {/loop}
             {/loop}
             {loop name="brand.feature" type="feature" product="{$ID}" title="isbn"}
-                {loop name="brand.value" type="feature_value" feature="{$ID}" product=$product_id}
+                {loop name="brand.value" type="feature_value" feature="{$ID}" product="{product attr="id"}"}
                     <meta itemprop="productID" content="isbn:{$TITLE}">
                 {/loop}
             {/loop}