diff --git a/addons/stock_account/stock_account.py b/addons/stock_account/stock_account.py
index 2fcc661c079..78d33b8ae04 100644
--- a/addons/stock_account/stock_account.py
+++ b/addons/stock_account/stock_account.py
@@ -194,7 +194,14 @@ class stock_quant(osv.osv):
             if move.product_id.cost_method == 'average':
                 valuation_amount = move.location_id.usage != 'internal' and move.location_dest_id.usage == 'internal' and cost or move.product_id.standard_price
             else:
-                valuation_amount = move.product_id.cost_method == 'real' and cost or move.product_id.standard_price
+                # TODO check also in average price and correct product price
+                if move.origin_returned_move_id:
+                    # use the original cost of the returned product to cancel the cost
+                    valuation_amount = move.origin_returned_move_id.price_unit
+                elif move.product_id.cost_method == 'real':
+                    valuation_amount = cost
+                else:
+                    valuation_amount = move.product_id.standard_price
         #the standard_price of the product may be in another decimal precision, or not compatible with the coinage of
         #the company currency... so we need to use round() before creating the accounting entries.
         valuation_amount = currency_obj.round(cr, uid, move.company_id.currency_id, valuation_amount * qty)