diff --git a/golem_family/models/golem_family.py b/golem_family/models/golem_family.py
index d6c7364..505dc9c 100644
--- a/golem_family/models/golem_family.py
+++ b/golem_family/models/golem_family.py
@@ -143,6 +143,8 @@ class GolemFamily(models.Model):
     note = fields.Text()
     count = fields.Integer(compute='_compute_count', store=True)
 
+    single_parent = fields.Boolean()
+
     @api.depends('member_ids')
     def _compute_count(self):
         for family in self: