diff --git a/addons/project/views/project_views.xml b/addons/project/views/project_views.xml
index 8b673c34834..90f1c308124 100644
--- a/addons/project/views/project_views.xml
+++ b/addons/project/views/project_views.xml
@@ -23,7 +23,7 @@
                <search string="Tasks">
                     <field name="name" string="Tasks"/>
                     <field name="tag_ids"/>
-                    <field name="partner_id"/>
+                    <field name="partner_id" operator="child_of"/>
                     <field name="project_id"/>
                     <field name="user_id"/>
                     <field name="stage_id"/>