diff --git a/addons/website_sale/controllers/main.py b/addons/website_sale/controllers/main.py
index 23225186dc8..78b411b20e6 100644
--- a/addons/website_sale/controllers/main.py
+++ b/addons/website_sale/controllers/main.py
@@ -169,7 +169,7 @@ class website_sale(http.Controller):
 
         values = {
             'search': search,
-            'category': category and int(category),
+            'category': category,
             'attrib_values': attrib_values,
             'attrib_set': attrib_set,
             'pager': pager,
diff --git a/addons/website_sale/views/templates.xml b/addons/website_sale/views/templates.xml
index 470ca8383f4..28f4d3e2418 100644
--- a/addons/website_sale/views/templates.xml
+++ b/addons/website_sale/views/templates.xml
@@ -240,7 +240,7 @@
 <!-- Add to cart button-->
 
 <template id="categories_recursive" name="Category list">
-  <li t-att-class="'active' if c.id == category else ''">
+  <li t-att-class="'active' if c.id == int(category or 0) else ''">
       <a t-att-href="keep('/shop/category/' + slug(c), category=0)" t-field="c.name"></a>
       <ul t-if="c.child_id" class="nav nav-pills nav-stacked nav-hierarchy">
           <t t-foreach="c.child_id" t-as="c">