diff --git a/partner_relations/model/res_partner_relation_all.py b/partner_relations/model/res_partner_relation_all.py
index 9d4656637..ca37e4527 100644
--- a/partner_relations/model/res_partner_relation_all.py
+++ b/partner_relations/model/res_partner_relation_all.py
@@ -167,9 +167,9 @@ class ResPartnerRelationAll(models.AbstractModel):
         domain = []
         if self.type_selection_id.partner_category_other is not False:
             domain.append(
-                ('category_id', 
-                'in', 
-                self.type_selection_id.partner_category_other.id)
+                ('category_id',
+                    'in',
+                    self.type_selection_id.partner_category_other.id)
             )
 
         if self.type_selection_id.contact_type_other is not False: