diff --git a/account.py b/account.py
index 7a84719067..c8004c4ff0 100644
--- a/account.py
+++ b/account.py
@@ -104,8 +104,7 @@ class Account(ModelSQL, ModelView):
     def default_mandatory(self, cursor, user, context=None):
         return False
 
-    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):
         currency_obj = self.pool.get('currency.currency')
         if vals.get('currency'):
             currency = currency_obj.browse(cursor, user, vals['currency'],
diff --git a/line.py b/line.py
index aca15894a9..345090639b 100644
--- a/line.py
+++ b/line.py
@@ -63,8 +63,7 @@ class Line(ModelSQL, ModelView):
     def default_active(self, cursor, user, context=None):
         return True
 
-    def on_change_with_currency(self, cursor, user, ids, vals,
-            context=None):
+    def on_change_with_currency(self, cursor, user, vals, context=None):
         move_line_obj = self.pool.get('account.move.line')
         if vals.get('move_line'):
             move_line = move_line_obj.browse(cursor, user, vals['move_line'],
@@ -78,8 +77,7 @@ class Line(ModelSQL, ModelView):
             res[line.id] = line.move_line.account.company.currency.id
         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):
         move_line_obj = self.pool.get('account.move.line')
         if vals.get('move_line'):
             move_line = move_line_obj.browse(cursor, user, vals['move_line'],