diff --git a/service.py b/service.py
index 76136cef36..1364b4a34a 100644
--- a/service.py
+++ b/service.py
@@ -9,16 +9,15 @@ from trytond.pyson import Eval
 class Employee(ModelSQL, ModelView, Cacheable):
     _name = 'company.employee'
 
-    cost_price = fields.Function('get_cost_price', string='Cost Price',
-            type='numeric', digits=(16, Eval('currency_digits', 2)),
-            depends=['currency_digits'],
-            help="Hourly cost price for this Employee")
+    cost_price = fields.Function(fields.Numeric('Cost Price',
+        digits=(16, Eval('currency_digits', 2)), depends=['currency_digits'],
+        help="Hourly cost price for this Employee"), 'get_cost_price')
     cost_prices = fields.One2Many('company.employee_cost_price', 'employee',
             'Cost Prices', help="List of hourly cost price over time")
-    currency_digits = fields.Function('get_currency_digits', type='integer',
-            string='Currency Digits', on_change_with=['company'])
+    currency_digits = fields.Function(fields.Integer('Currency Digits',
+        on_change_with=['company']), 'get_currency_digits')
 
-    def get_cost_price(self, cursor, user, ids, name, arg, context=None):
+    def get_cost_price(self, cursor, user, ids, name, context=None):
         '''
         Return the cost price at the date given in the context or the
         current date
@@ -65,7 +64,7 @@ class Employee(ModelSQL, ModelView, Cacheable):
                     break
         return cost
 
-    def get_currency_digits(self, cursor, user, ids, name, arg, context=None):
+    def get_currency_digits(self, cursor, user, ids, name, context=None):
         res = {}
         for employee in self.browse(cursor, user, ids, context=context):
             res[employee.id] = employee.company.currency.digits
@@ -105,8 +104,8 @@ class EmployeeCostPrice(ModelSQL, ModelView):
             required=True, depends=['currency_digits'],
             help="Hourly cost price")
     employee = fields.Many2One('company.employee', 'Employee')
-    currency_digits = fields.Function('get_currency_digits', type='integer',
-            string='Currency Digits', on_change_with=['employee'])
+    currency_digits = fields.Function(fields.Integer('Currency Digits',
+        on_change_with=['employee']), 'get_currency_digits')
 
     def __init__(self):
         super(EmployeeCostPrice, self).__init__()
@@ -135,7 +134,7 @@ class EmployeeCostPrice(ModelSQL, ModelView):
         return super(EmployeeCostPrice , self).write(cursor, user, ids, vals,
                 context=context)
 
-    def get_currency_digits(self, cursor, user, ids, name, arg, context=None):
+    def get_currency_digits(self, cursor, user, ids, name, context=None):
         res = {}
         for costprice in self.browse(cursor, user, ids, context=context):
             res[costprice.id] = costprice.employee.company.currency.digits
diff --git a/work.py b/work.py
index d3a11dd9cc..33f8a6f679 100644
--- a/work.py
+++ b/work.py
@@ -42,19 +42,18 @@ class Work(ModelSQL, ModelView):
             states={
                 'invisible': Not(Equal(Eval('type'), 'task')),
             }, depends=['type', 'currency_digits'])
-    revenue = fields.Function('get_revenue', type='numeric',
-            string='Revenue',
-            digits=(16, Eval('currency_digits', 2)),
-            states={
-                'invisible': Not(Equal(Eval('type'), 'project')),
-            }, depends=['type', 'currency_digits'])
-    cost = fields.Function('get_cost', string='Cost', type='numeric',
-            digits=(16, Eval('currency_digits', 2)),
-            depends=['currency_digits'])
-    currency_digits = fields.Function('get_currency_digits', type='integer',
-            string='Currency Digits', on_change_with=['company'])
+    revenue = fields.Function(fields.Numeric('Revenue',
+        digits=(16, Eval('currency_digits', 2)),
+        states={
+            'invisible': Not(Equal(Eval('type'), 'project')),
+        }, depends=['type', 'currency_digits']), 'get_revenue')
+    cost = fields.Function(fields.Numeric('Cost',
+        digits=(16, Eval('currency_digits', 2)), depends=['currency_digits']),
+        'get_cost')
+    currency_digits = fields.Function(fields.Integer('Currency Digits',
+        on_change_with=['company']), 'get_currency_digits')
 
-    def get_cost(self, cursor, user, ids, name, arg, context=None):
+    def get_cost(self, cursor, user, ids, name, context=None):
         timesheet_line_obj = self.pool.get('timesheet.line')
         all_ids = self.search(cursor, user, [
                 ('parent', 'child_of', ids),
@@ -90,7 +89,7 @@ class Work(ModelSQL, ModelView):
 
         return res
 
-    def get_revenue(self, cursor, user, ids, name, arg, context=None):
+    def get_revenue(self, cursor, user, ids, name, context=None):
         all_ids = self.search(cursor, user, [
                 ('parent', 'child_of', ids),
                 ('active', '=', True)], context=context) + ids
@@ -125,7 +124,7 @@ class Work(ModelSQL, ModelView):
 
         return res
 
-    def get_currency_digits(self, cursor, user, ids, name, arg, context=None):
+    def get_currency_digits(self, cursor, user, ids, name, context=None):
         res = {}
         for work in self.browse(cursor, user, ids, context=context):
             res[work.id] = work.company.currency.digits