diff --git a/addons/website_sale_comparison/views/website_sale_comparison_template.xml b/addons/website_sale_comparison/views/website_sale_comparison_template.xml
index 3889b05a148..9bb6e10488f 100644
--- a/addons/website_sale_comparison/views/website_sale_comparison_template.xml
+++ b/addons/website_sale_comparison/views/website_sale_comparison_template.xml
@@ -57,7 +57,7 @@
 
     <template id='recommended_product' inherit_id="website_sale.recommended_products" name="Alternative Products">
         <xpath expr="//h3" position="replace">
-            <t t-set="ids" t-value="str(product.id) + ','+ ','.join([str(a) for a in product.alternative_product_ids.ids])"></t>
+            <t t-set="ids" t-value="str(product.product_variant_id.id) + ','+ ','.join([str(a) for a in product.alternative_product_ids.mapped('product_variant_id.id')])"/>
             <div><span class='h3'>Suggested alternatives: </span><a class="btn btn-primary" t-attf-href="/shop/compare/?products=#{ids}"><i class="fa fa-exchange"></i> Compare</a></div>
         </xpath>
     </template>