diff --git a/addons/stock/models/stock_rule.py b/addons/stock/models/stock_rule.py
index faa4d699876..899343db755 100644
--- a/addons/stock/models/stock_rule.py
+++ b/addons/stock/models/stock_rule.py
@@ -233,7 +233,7 @@ class StockRule(models.Model):
         forecasted_qties_by_loc = {}
         for location, product_ids in mtso_products_by_locations.items():
             products = self.env['product.product'].browse(product_ids).with_context(location=location.id)
-            forecasted_qties_by_loc[location] = {product.id: product.virtual_available for product in products}
+            forecasted_qties_by_loc[location] = {product.id: product.free_qty for product in products}
 
         # Prepare the move values, adapt the `procure_method` if needed.
         for procurement, rule in procurements: