diff --git a/addons/purchase/stock.py b/addons/purchase/stock.py
index e32528f985d..f8f21428540 100644
--- a/addons/purchase/stock.py
+++ b/addons/purchase/stock.py
@@ -143,8 +143,12 @@ class stock_partial_picking(osv.osv_memory):
                 if has_product_cost and m.product_id.cost_method == 'average' and m.purchase_line_id:
                     # We use the original PO unit purchase price as the basis for the cost, expressed
                     # in the currency of the PO (i.e the PO's pricelist currency)
-                    res['move%s_product_price'%(m.id)] =  m.purchase_line_id.price_unit
-                    res['move%s_product_currency'%(m.id)] = pick.purchase_id.pricelist_id.currency_id.id
+                    list_index = 0
+                    for item in res['product_moves_in']:
+                        if item['move_id'] == m.id:
+                            res['product_moves_in'][list_index]['cost'] = m.purchase_line_id.price_unit
+                            res['product_moves_in'][list_index]['currency'] = m.picking_id.purchase_id.pricelist_id.currency_id.id
+                        list_index += 1
         return res
 stock_partial_picking()
 
@@ -168,8 +172,12 @@ class stock_partial_move(osv.osv_memory):
                 and m.purchase_line_id and m.picking_id.purchase_id:
                     # We use the original PO unit purchase price as the basis for the cost, expressed
                     # in the currency of the PO (i.e the PO's pricelist currency)
-                    res['move%s_product_price'%(m.id)] = m.purchase_line_id.price_unit
-                    res['move%s_product_currency'%(m.id)] = m.picking_id.purchase_id.pricelist_id.currency_id.id
+                    list_index = 0
+                    for item in res['product_moves_in']:
+                        if item['move_id'] == m.id:
+                            res['product_moves_in'][list_index]['cost'] = m.purchase_line_id.price_unit
+                            res['product_moves_in'][list_index]['currency'] = m.picking_id.purchase_id.pricelist_id.currency_id.id
+                        list_index += 1
         return res
 stock_partial_move()
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