diff --git a/addons/product/views/product_views.xml b/addons/product/views/product_views.xml
index cf18e49c908..e0a6c5e950b 100644
--- a/addons/product/views/product_views.xml
+++ b/addons/product/views/product_views.xml
@@ -424,7 +424,7 @@
                     <field name="product_template_variant_value_ids" widget="many2many_tags" readonly="1" groups="product.group_product_variant"/>
                 </xpath>
                 <field name="product_tag_ids" position="attributes">
-                    <attribute name="options">{'no_open': true}</attribute>
+                    <attribute name="options">{'no_open': True}</attribute>
                 </field>
                 <field name="product_tag_ids" position="after">
                     <field name="additional_product_tag_ids" widget="many2many_tags"/>