diff --git a/gestion/gen_confs/firewall4/utils.py b/gestion/gen_confs/firewall4/utils.py
index 9ef6bfaf..a2f84514 100644
--- a/gestion/gen_confs/firewall4/utils.py
+++ b/gestion/gen_confs/firewall4/utils.py
@@ -66,7 +66,7 @@ class firewall_tools(object) :
         if self._adherents:
             return self._adherents
         self._machines, self._adherents = self.conn.allMachinesAdherents()
-        self._adherents = [ adh for adh in self._adherents if adh.paiement_ok ]
+        self._adherents = [ adh for adh in self._adherents if adh.paiement_ok() ]
         return self._adherents
 
     def blacklisted_machines(self):