diff --git a/addons/product/product.py b/addons/product/product.py
index b055e704785..7e7f7375e87 100644
--- a/addons/product/product.py
+++ b/addons/product/product.py
@@ -291,7 +291,7 @@ class product_template(osv.osv):
         'uom_po_id': fields.many2one('product.uom', 'Purchase Unit of Measure', required=True, help="Default Unit of Measure used for purchase orders. It must be in the same category than the default unit of measure."),
         'uos_id' : fields.many2one('product.uom', 'Unit of Sale',
             help='Used by companies that manage two units of measure: invoicing and inventory management. For example, in food industries, you will manage a stock of ham but invoice in Kg. Keep empty to use the default UOM.'),
-        'uos_coeff': fields.float('UOM -> UOS Coeff', digits=(16,4),
+        'uos_coeff': fields.float('UOM -> UOS Coeff', digits_compute= dp.get_precision('Product UoS'),
             help='Coefficient to convert UOM to UOS\n'
             ' uos = uom * coeff'),
         'mes_type': fields.selection((('fixed', 'Fixed'), ('variable', 'Variable')), 'Measure Type', required=True),
diff --git a/addons/product/product_data.xml b/addons/product/product_data.xml
index 31e93f46d5f..023cb431382 100644
--- a/addons/product/product_data.xml
+++ b/addons/product/product_data.xml
@@ -164,5 +164,9 @@ parameter) will see those record just disappear.
             <field name="name">Product UoM</field>
             <field name="digits" eval="3"/>
         </record>
+        <record forcecreate="True" id="decimal_product_uos" model="decimal.precision">
+            <field name="name">Product UoS</field>
+            <field name="digits" eval="3"/>
+        </record>        
     </data>
 </openerp>
diff --git a/addons/sale/sale.py b/addons/sale/sale.py
index d9b8cfb88f9..c78678054c9 100644
--- a/addons/sale/sale.py
+++ b/addons/sale/sale.py
@@ -191,7 +191,7 @@ class sale_order(osv.osv):
         return result.keys()
 
     _columns = {
-        'name': fields.char('Order Reference', size=64, required=True,
+        'name': fields.char('Order Reference', size=64,
             readonly=True, states={'draft': [('readonly', False)]}, select=True),
         'shop_id': fields.many2one('sale.shop', 'Shop', required=True, readonly=True, states={'draft': [('readonly', False)]}),
         'origin': fields.char('Source Document', size=64, help="Reference of the document that generated this sales order request."),
@@ -885,9 +885,9 @@ class sale_order_line(osv.osv):
             help="If 'on order', it triggers a procurement when the sale order is confirmed to create a task, purchase order or manufacturing order linked to this sale order line."),
         'property_ids': fields.many2many('mrp.property', 'sale_order_line_property_rel', 'order_id', 'property_id', 'Properties', readonly=True, states={'draft': [('readonly', False)]}),
         'address_allotment_id': fields.many2one('res.partner.address', 'Allotment Partner'),
-        'product_uom_qty': fields.float('Quantity (UoM)', digits=(16, 2), required=True, readonly=True, states={'draft': [('readonly', False)]}),
+        'product_uom_qty': fields.float('Quantity (UoM)', digits_compute= dp.get_precision('Product UoS'), required=True, readonly=True, states={'draft': [('readonly', False)]}),
         'product_uom': fields.many2one('product.uom', 'Unit of Measure ', required=True, readonly=True, states={'draft': [('readonly', False)]}),
-        'product_uos_qty': fields.float('Quantity (UoS)', readonly=True, states={'draft': [('readonly', False)]}),
+        'product_uos_qty': fields.float('Quantity (UoS)' ,digits_compute= dp.get_precision('Product UoS'), readonly=True, states={'draft': [('readonly', False)]}),
         'product_uos': fields.many2one('product.uom', 'Product UoS'),
         'product_packaging': fields.many2one('product.packaging', 'Packaging'),
         'move_ids': fields.one2many('stock.move', 'sale_line_id', 'Inventory Moves', readonly=True),