diff --git a/addons/product/product.py b/addons/product/product.py
index 1197e9c318c..6791afaeb4f 100644
--- a/addons/product/product.py
+++ b/addons/product/product.py
@@ -511,7 +511,8 @@ class product_template(osv.osv):
         'list_price': fields.float('Sale Price', digits_compute=dp.get_precision('Product Price'), help="Base price to compute the customer price. Sometimes called the catalog price."),
         'lst_price' : fields.related('list_price', type="float", string='Public Price', digits_compute=dp.get_precision('Product Price')),
         'standard_price': fields.property(type = 'float', digits_compute=dp.get_precision('Product Price'), 
-                                          help="Cost price of the product template used for standard stock valuation in accounting and used as a base price on purchase orders.", 
+                                          help="Cost price of the product template used for standard stock valuation in accounting and used as a base price on purchase orders. "
+                                               "Expressed in the default unit of measure of the product.",
                                           groups="base.group_user", string="Cost Price"),
         'volume': fields.float('Volume', help="The volume in m3."),
         'weight': fields.float('Gross Weight', digits_compute=dp.get_precision('Stock Weight'), help="The gross weight in Kg."),