diff --git a/odoo/addons/base/rng/calendar_view.rng b/odoo/addons/base/rng/calendar_view.rng
index fc1c8d9eedd..72ef55ded27 100644
--- a/odoo/addons/base/rng/calendar_view.rng
+++ b/odoo/addons/base/rng/calendar_view.rng
@@ -26,6 +26,7 @@
             <rng:optional><rng:attribute name="create"/></rng:optional>
             <rng:optional><rng:attribute name="delete"/></rng:optional>
             <rng:optional><rng:attribute name="scales"/></rng:optional>
+            <rng:optional><rng:attribute name="banner_route"/></rng:optional>
             <rng:optional>
                 <rng:attribute name="mode">
                     <rng:choice>