diff --git a/addons/project/project_view.xml b/addons/project/project_view.xml
index d3b28c0d562..a2c52d3d85b 100644
--- a/addons/project/project_view.xml
+++ b/addons/project/project_view.xml
@@ -356,7 +356,7 @@
             <field name="type">calendar</field>
             <field eval="2" name="priority"/>
             <field name="arch" type="xml">
-                <calendar color="user_id" date_delay="planned_hours" date_start="date_start" string="Tasks">
+                <calendar color="user_id" date_delay="planned_hours" date_start="date_deadline" string="Tasks">
                     <field name="name"/>
                     <field name="project_id"/>
                 </calendar>