diff --git a/journal.py b/journal.py
index 6bebb786b7..4edf840a3c 100644
--- a/journal.py
+++ b/journal.py
@@ -242,8 +242,7 @@ class Period(ModelSQL, ModelView):
 
     def delete(self, cursor, user, ids, context=None):
         self._check(cursor, user, ids, context=context)
-        return super(Period, self).delete(cursor, user, ids, vals,
-                context=context)
+        return super(Period, self).delete(cursor, user, ids, context=context)
 
     def close(self, cursor, user, ids, context=None):
         '''