diff --git a/golem_member_minor/wizard/golem_membership_invoice.py b/golem_member_minor/wizard/golem_membership_invoice.py
index e7c74d1..c2e0c72 100644
--- a/golem_member_minor/wizard/golem_membership_invoice.py
+++ b/golem_member_minor/wizard/golem_membership_invoice.py
@@ -33,11 +33,15 @@ class GolemMembershipInvoice(models.TransientModel):
     def onchange_member(self):
         """ Set partner domain if src_member_id is filled """
         self.ensure_one()
-        record  = self[0]
-        domain = ([('id', 'in',
-                    record.src_member_id.mapped('legal_guardian_ids.legal_guardian_id').ids)]
-                  if record.src_member_id.is_minor else [])
-        return {'domain': {'partner_id': domain}}
+        record = self[0]
+        if record.src_member_id.is_minor:
+            partner_ids = record.src_member_id.mapped('legal_guardian_ids.legal_guardian_id').ids
+        else:
+            partner_ids = []
+        if hasattr(record.src_member_id, 'family_member_ids'):
+            partner_ids += record.src_member_id.family_member_ids.filtered(
+                lambda r: r.id != self.src_member_id.partner_id.id).ids
+        return {'domain': {'partner_id': [('id', 'in', partner_ids)]}}
 
     @api.multi
     def membership_invoice(self):