diff --git a/addons/purchase_stock/models/stock_rule.py b/addons/purchase_stock/models/stock_rule.py
index ea9d574195e8d..6e6f18287db62 100644
--- a/addons/purchase_stock/models/stock_rule.py
+++ b/addons/purchase_stock/models/stock_rule.py
@@ -221,7 +221,7 @@ def _prepare_purchase_order_line(self, product_id, product_qty, product_uom, com
             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,
         )