diff --git a/weboob/capabilities/bill.py b/weboob/capabilities/bill.py
index c8dc673e137d4fd594b9b4bd45468175d1684547..a6a2235a5861d3ea766807c36bd2b1025c81848b 100644
--- a/weboob/capabilities/bill.py
+++ b/weboob/capabilities/bill.py
@@ -93,7 +93,7 @@ class Bill(Document, Currency):
 
     def __init__(self, *args, **kwargs):
         super(Bill, self).__init__(*args, **kwargs)
-        self.type = u'bill'
+        self.type = DocumentTypes.BILL
 
 
 class Subscription(BaseObject):