diff --git a/addons/purchase/models/purchase.py b/addons/purchase/models/purchase.py
index 1814799f97e..a05edfedbf1 100644
--- a/addons/purchase/models/purchase.py
+++ b/addons/purchase/models/purchase.py
@@ -779,7 +779,7 @@ class PurchaseOrderLine(models.Model):
             price_unit = seller.currency_id._convert(
                 price_unit, po.currency_id, po.company_id, po.date_order or fields.Date.today())
 
-        product_lang = product_id.with_context(
+        product_lang = product_id.with_prefetch().with_context(
             lang=partner.lang,
             partner_id=partner.id,
         )