diff --git a/addons/account_anglo_saxon/invoice.py b/addons/account_anglo_saxon/invoice.py
index 8b31a48b92b..81394bc926e 100644
--- a/addons/account_anglo_saxon/invoice.py
+++ b/addons/account_anglo_saxon/invoice.py
@@ -21,21 +21,25 @@
 #
 ##############################################################################
 
-from openerp.osv import osv
+from openerp.osv import osv, fields
 
 class account_invoice_line(osv.osv):
     _inherit = "account.invoice.line"
 
+    _columns = {
+        'move_id': fields.many2one('stock.move', string="Move line", help="If the invoice was generated from a stock.picking, reference to the related move line."),
+    }
+
     def move_line_get(self, cr, uid, invoice_id, context=None):
         res = super(account_invoice_line,self).move_line_get(cr, uid, invoice_id, context=context)
         inv = self.pool.get('account.invoice').browse(cr, uid, invoice_id, context=context)
         company_currency = inv.company_id.currency_id.id
-        def get_price(cr, uid, inv, company_currency,i_line):
+        def get_price(cr, uid, inv, company_currency, i_line, price_unit):
             cur_obj = self.pool.get('res.currency')
             if inv.currency_id.id != company_currency:
-                price = cur_obj.compute(cr, uid, company_currency, inv.currency_id.id, i_line.product_id.standard_price * i_line.quantity, context={'date': inv.date_invoice})
+                price = cur_obj.compute(cr, uid, company_currency, inv.currency_id.id, price_unit * i_line.quantity, context={'date': inv.date_invoice})
             else:
-                price = i_line.product_id.standard_price * i_line.quantity
+                price = price_unit * i_line.quantity
             return price
 
         if inv.type in ('out_invoice','out_refund'):
@@ -60,12 +64,13 @@ class account_invoice_line(osv.osv):
                     if not cacc:
                         cacc = i_line.product_id.categ_id.property_account_expense_categ and i_line.product_id.categ_id.property_account_expense_categ.id
                     if dacc and cacc:
+                        price_unit = i_line.move_id and i_line.move_id.price_unit or i_line.product_id.standard_price
                         res.append({
                             'type':'src',
                             'name': i_line.name[:64],
-                            'price_unit':i_line.product_id.standard_price,
+                            'price_unit':price_unit,
                             'quantity':i_line.quantity,
-                            'price':get_price(cr, uid, inv, company_currency, i_line),
+                            'price':get_price(cr, uid, inv, company_currency, i_line, price_unit),
                             'account_id':dacc,
                             'product_id':i_line.product_id.id,
                             'uos_id':i_line.uos_id.id,
@@ -76,9 +81,9 @@ class account_invoice_line(osv.osv):
                         res.append({
                             'type':'src',
                             'name': i_line.name[:64],
-                            'price_unit':i_line.product_id.standard_price,
+                            'price_unit':price_unit,
                             'quantity':i_line.quantity,
-                            'price': -1 * get_price(cr, uid, inv, company_currency, i_line),
+                            'price': -1 * get_price(cr, uid, inv, company_currency, i_line, price_unit),
                             'account_id':cacc,
                             'product_id':i_line.product_id.id,
                             'uos_id':i_line.uos_id.id,
diff --git a/addons/account_anglo_saxon/stock.py b/addons/account_anglo_saxon/stock.py
index 1cf3ecf21ef..278deb9a2a8 100644
--- a/addons/account_anglo_saxon/stock.py
+++ b/addons/account_anglo_saxon/stock.py
@@ -28,6 +28,15 @@ class stock_picking(osv.osv):
     _inherit = "stock.picking"
     _description = "Picking List"
 
+    def _prepare_invoice_line(self, cr, uid, group, picking, move_line, invoice_id,
+        invoice_vals, context=None):
+        """Overwrite to add move_id reference"""
+        res = super(stock_picking, self)._prepare_invoice_line(cr, uid, group, picking, move_line, invoice_id, invoice_vals, context=context)
+        res.update({
+            'move_id': move_line.id,
+        })
+        return res
+
     def action_invoice_create(self, cr, uid, ids, journal_id=False,
             group=False, type='out_invoice', context=None):
         '''Return ids of created invoices for the pickings'''