diff --git a/odoo/addons/base/rng/common.rng b/odoo/addons/base/rng/common.rng
index aee71ada508..6af3e86ce96 100644
--- a/odoo/addons/base/rng/common.rng
+++ b/odoo/addons/base/rng/common.rng
@@ -340,6 +340,7 @@
             <rng:optional><rng:attribute name="help"/></rng:optional>
             <rng:optional><rng:attribute name="class"/></rng:optional>
             <rng:optional><rng:attribute name="default_focus"/></rng:optional>
+            <rng:optional><rng:attribute name="tabindex"/></rng:optional>
             <rng:optional><rng:attribute name="title"/></rng:optional>
             <rng:optional><rng:attribute name="aria-label"/></rng:optional>
             <rng:optional><rng:attribute name="aria-pressed"/></rng:optional>