diff --git a/INSTALL b/INSTALL
index a333c18f5c..91269ed19a 100644
--- a/INSTALL
+++ b/INSTALL
@@ -9,6 +9,7 @@ Prerequisites
  * trytond_account_stock_landed_cost (http://www.tryton.org/)
  * trytond_product (http://www.tryton.org/)
  * trytond_product_measurements (http://www.tryton.org/)
+ * trytond_stock_shipment_measurements (http://www.tryton.org/)
 
 Installation
 ------------
diff --git a/account.py b/account.py
index e89a22945e..861d164c2b 100644
--- a/account.py
+++ b/account.py
@@ -2,7 +2,7 @@
 # this repository contains the full copyright notices and license terms.
 from decimal import Decimal
 
-from trytond.pool import PoolMeta, Pool
+from trytond.pool import PoolMeta
 
 __all__ = ['LandedCost']
 
@@ -21,25 +21,13 @@ class LandedCost:
 
     def _get_weight_factors(self):
         "Return the factor for each move based on weight"
-        pool = Pool()
-        ModelData = pool.get('ir.model.data')
-        Uom = pool.get('product.uom')
-
-        kg = Uom(ModelData.get_id('product', 'uom_kilogram'))
         moves = [m for s in self.shipments for m in s.incoming_moves
             if m.state != 'cancel']
 
         sum_weight = Decimal(0)
         weights = {}
         for move in moves:
-            if not move.product.weight:
-                weight = 0
-            else:
-                weight = Uom.compute_qty(
-                    move.product.weight_uom,
-                    move.product.weight * move.internal_quantity,
-                    kg, round=False)
-            weight = Decimal(str(weight))
+            weight = Decimal(str(move.internal_weight or 0))
             weights[move.id] = weight
             sum_weight += weight
         factors = {}
diff --git a/tryton.cfg b/tryton.cfg
index 245b41b4e9..fffc0f828d 100644
--- a/tryton.cfg
+++ b/tryton.cfg
@@ -5,3 +5,4 @@ depends:
     ir
     product
     product_measurements
+    stock_shipment_measurements