diff --git a/addons/project/views/project_views.xml b/addons/project/views/project_views.xml
index 7ace9328781..ff4f92c9305 100644
--- a/addons/project/views/project_views.xml
+++ b/addons/project/views/project_views.xml
@@ -50,8 +50,8 @@
                     <group expand="0" string="Group By">
                         <filter string="Project" name="project" context="{'group_by':'project_id'}"/>
                         <filter string="Task" name="task" context="{'group_by':'name'}"/>
-                        <filter string="Assigned to" name="User" context="{'group_by':'user_id'}"/>
-                        <filter string="Stage" name="Stage" context="{'group_by':'stage_id'}"/>
+                        <filter string="Assigned to" name="user" context="{'group_by':'user_id'}"/>
+                        <filter string="Stage" name="stage" context="{'group_by':'stage_id'}"/>
                         <filter string="Company" name="company" context="{'group_by':'company_id'}" groups="base.group_multi_company"/>
                         <separator/>
                         <filter string="Last Message" name="group_message_last_post" context="{'group_by':'message_last_post:week'}"/>