diff --git a/odoo/addons/base/rng/gantt_view.rng b/odoo/addons/base/rng/gantt_view.rng
index 00491427d6a..cd4451714dd 100644
--- a/odoo/addons/base/rng/gantt_view.rng
+++ b/odoo/addons/base/rng/gantt_view.rng
@@ -18,6 +18,7 @@
             <rng:optional><rng:attribute name="consolidation_exclude"/></rng:optional>
             <rng:optional><rng:attribute name="string"/></rng:optional>
             <rng:optional><rng:attribute name="create"/></rng:optional>
+            <rng:optional><rng:attribute name="on_create"/></rng:optional>
             <rng:optional><rng:attribute name="edit"/></rng:optional>
             <rng:optional><rng:attribute name="plan"/></rng:optional>
             <rng:optional><rng:attribute name="default_group_by"/></rng:optional>