diff --git a/odoo/addons/base/res/res_lang_view.xml b/odoo/addons/base/res/res_lang_view.xml
index 6e8eed8d4af..ebf2922eb81 100644
--- a/odoo/addons/base/res/res_lang_view.xml
+++ b/odoo/addons/base/res/res_lang_view.xml
@@ -5,7 +5,7 @@
             <field name="name">res.lang.tree</field>
             <field name="model">res.lang</field>
             <field name="arch" type="xml">
-                <tree string="Languages" colors="gray:not active" >
+                <tree string="Languages" decoration-muted="active == False" >
                     <field name="name"/>
                     <field name="code"/>
                     <field name="iso_code"/>