diff --git a/views/res_partner.xml b/views/res_partner.xml
index b549d9942de2becb2ea6095b387167b2ae357965..d50b2972e41f02d13ad2a069ca254c09c5adf670 100644
--- a/views/res_partner.xml
+++ b/views/res_partner.xml
@@ -240,6 +240,7 @@
                 </xpath>
                 <xpath expr="//field[@name='category_id']" position="after">
                     <field name="mandate_id" optional="show" />
+                    <field name="function" optional="hide" />
                     <field
                         name="project_category_ids"
                         optional="show"