diff --git a/addons/l10n_it_stock_ddt/report/l10n_it_ddt_report.xml b/addons/l10n_it_stock_ddt/report/l10n_it_ddt_report.xml
index f972fddee3d..37abefa86b5 100644
--- a/addons/l10n_it_stock_ddt/report/l10n_it_ddt_report.xml
+++ b/addons/l10n_it_stock_ddt/report/l10n_it_ddt_report.xml
@@ -178,7 +178,7 @@
     <template id="report_ddt">
         <t t-call="web.html_container">
             <t t-foreach="docs" t-as="o">
-                <t t-set="lang" t-value="o.partner_id.lang if o.partner_id.lang else o.env.lang"/>
+                <t t-set="lang" t-value="o._get_report_lang()"/>
                 <t t-call="l10n_it_stock_ddt.report_ddt_view" t-lang="lang"/>
             </t>
         </t>