diff --git a/Brie/brie/lib/aurore_helper.py b/Brie/brie/lib/aurore_helper.py
index ca9367a..cdd87cc 100644
--- a/Brie/brie/lib/aurore_helper.py
+++ b/Brie/brie/lib/aurore_helper.py
@@ -179,7 +179,7 @@ class CotisationComputes:
             cotisations = Cotisation.cotisations_of_member(user_session, member_dn, current_year)
         #end if
         #en septembre, on ne met pas de membre en old afin que les anciens ne soient pas deconnectes
-        return Room.get_by_member_dn(user_session, residence_dn, member_dn) == None or datetime.datetime.now().month != 9 or cotisations == []
+        return Room.get_by_member_dn(user_session, residence_dn, member_dn) == None or (datetime.datetime.now().month != 9 and cotisations == [])
     #end def
 
     @staticmethod