diff --git a/addons/project/views/project_views.xml b/addons/project/views/project_views.xml
index 4a5de69a657..d262610462c 100644
--- a/addons/project/views/project_views.xml
+++ b/addons/project/views/project_views.xml
@@ -77,7 +77,7 @@
         <record id="project_task_action_sub_task" model="ir.actions.act_window">
             <field name="name">Sub-tasks</field>
             <field name="res_model">project.task</field>
-            <field name="view_mode">kanban,tree,form,calendar,pivot,graph</field>
+            <field name="view_mode">kanban,tree,form,calendar,pivot,graph,activity</field>
             <field name="search_view_id" ref="project.view_task_search_form"/>
         </record>
 
@@ -667,7 +667,7 @@
         <record id="action_view_task" model="ir.actions.act_window">
             <field name="name">Tasks</field>
             <field name="res_model">project.task</field>
-            <field name="view_mode">kanban,tree,form,calendar,pivot,graph</field>
+            <field name="view_mode">kanban,tree,form,calendar,pivot,graph,activity</field>
             <field name="context">{'search_default_my_tasks': 1}</field>
             <field name="search_view_id" ref="view_task_search_form"/>
             <field name="help" type="html">