diff --git a/addons/project/report/project_cumulative.xml b/addons/project/report/project_cumulative.xml
index 535fbaf5f87..177e945bc93 100644
--- a/addons/project/report/project_cumulative.xml
+++ b/addons/project/report/project_cumulative.xml
@@ -9,6 +9,7 @@
             <field name="arch" type="xml">
                 <tree string="Tasks's Cumulative Flow">
                     <field name="date"/>
+                    <field name="project_id"/>
                     <field name="task_id"/>
                     <field name="type_id"/>
                     <field name="user_id"/>