diff --git a/objets.py b/objets.py
index 4df1add..99f1730 100644
--- a/objets.py
+++ b/objets.py
@@ -879,7 +879,7 @@ class proprio(CransLdapObject):
         elif config.periode_transitoire or not config.bl_carte_et_actif:
             return True
         else:
-            return config.ann_scol in self.get('carteEtudiant', []) or self.sursis_carte()
+            return bool(self.get('carteEtudiant', [])) or self.sursis_carte()
 
     # XXX - To Delete
     def update_solde(self, diff, comment=u"", login=None):