diff --git a/addons/stock_account/models/product.py b/addons/stock_account/models/product.py
index 18df38c2f1d..dfc58549e9d 100644
--- a/addons/stock_account/models/product.py
+++ b/addons/stock_account/models/product.py
@@ -585,7 +585,7 @@ class ProductProduct(models.Model):
             qty_taken_on_candidate = min(qty_to_take_on_candidates, candidate_quantity)
 
             qty_to_take_on_candidates -= qty_taken_on_candidate
-            tmp_value += qty_taken_on_candidate * candidate.unit_cost
+            tmp_value += qty_taken_on_candidate * (candidate.value / candidate.quantity)
             if float_is_zero(qty_to_take_on_candidates, precision_rounding=candidate.uom_id.rounding):
                 break