diff --git a/addons/purchase/models/purchase.py b/addons/purchase/models/purchase.py
index 34ba86005dd..49924ebd1f6 100644
--- a/addons/purchase/models/purchase.py
+++ b/addons/purchase/models/purchase.py
@@ -1227,10 +1227,10 @@ class PurchaseOrderLine(models.Model):
             return {'warning': warning}
         return {}
 
-    @api.depends('product_qty', 'product_uom')
+    @api.depends('product_qty', 'product_uom', 'company_id')
     def _compute_price_unit_and_date_planned_and_name(self):
         for line in self:
-            if not line.product_id or line.invoice_lines:
+            if not line.product_id or line.invoice_lines or not line.company_id:
                 continue
             params = {'order_id': line.order_id}
             seller = line.product_id._select_seller(