diff --git a/addons/stock_account/models/stock_valuation_layer.py b/addons/stock_account/models/stock_valuation_layer.py
index 1e6d7961632..78d964e0451 100644
--- a/addons/stock_account/models/stock_valuation_layer.py
+++ b/addons/stock_account/models/stock_valuation_layer.py
@@ -14,7 +14,7 @@ class StockValuationLayer(models.Model):
     _rec_name = 'product_id'
 
     company_id = fields.Many2one('res.company', 'Company', readonly=True, required=True)
-    product_id = fields.Many2one('product.product', 'Product', readonly=True, required=True, check_company=True)
+    product_id = fields.Many2one('product.product', 'Product', readonly=True, required=True, check_company=True, auto_join=True)
     categ_id = fields.Many2one('product.category', related='product_id.categ_id')
     product_tmpl_id = fields.Many2one('product.template', related='product_id.product_tmpl_id')
     quantity = fields.Float('Quantity', digits=0, help='Quantity', readonly=True)