diff --git a/service.py b/service.py
index 1364b4a34a..cf40c1b47d 100644
--- a/service.py
+++ b/service.py
@@ -70,8 +70,7 @@ class Employee(ModelSQL, ModelView, Cacheable):
             res[employee.id] = employee.company.currency.digits
         return res
 
-    def on_change_with_currency_digits(self, cursor, user, ids, vals,
-            context=None):
+    def on_change_with_currency_digits(self, cursor, user, vals, context=None):
         company_obj = self.pool.get('company.company')
         if vals.get('company'):
             company = company_obj.browse(cursor, user, vals['company'],
@@ -140,8 +139,7 @@ class EmployeeCostPrice(ModelSQL, ModelView):
             res[costprice.id] = costprice.employee.company.currency.digits
         return res
 
-    def on_change_with_currency_digits(self, cursor, user, ids, vals,
-            context=None):
+    def on_change_with_currency_digits(self, cursor, user, vals, context=None):
         company_obj = self.pool.get('company.employee')
         if vals.get('employee'):
             employee = employee_obj.browse(cursor, user, vals['employee'],
diff --git a/work.py b/work.py
index 33f8a6f679..c8c2e39042 100644
--- a/work.py
+++ b/work.py
@@ -130,8 +130,7 @@ class Work(ModelSQL, ModelView):
             res[work.id] = work.company.currency.digits
         return res
 
-    def on_change_with_currency_digits(self, cursor, user, ids, vals,
-            context=None):
+    def on_change_with_currency_digits(self, cursor, user, vals, context=None):
         company_obj = self.pool.get('company.company')
         if vals.get('company'):
             company = company_obj.browse(cursor, user, vals['company'],
@@ -150,7 +149,7 @@ class Work(ModelSQL, ModelView):
             return company.currency.digits
         return 2
 
-    def on_change_product(self, cursor, user, ids, vals, context=None):
+    def on_change_product(self, cursor, user, vals, context=None):
         product_obj = self.pool.get('product.product')
         user_obj = self.pool.get('res.user')
         company_obj = self.pool.get('company.company')