diff --git a/gestion/gen_confs/firewall4/base.py b/gestion/gen_confs/firewall4/base.py
index bb3380cd..b161ecf4 100644
--- a/gestion/gen_confs/firewall4/base.py
+++ b/gestion/gen_confs/firewall4/base.py
@@ -131,7 +131,7 @@ class firewall(utils.firewall_tools) :
 
     def mac_ip_remove(self, mac, ip):
         machine = {'macAddress':[mac], 'ipHostNumber': [ip]}
-        self.test_mac_ip_dispatch(lambda set, data: set.ipset['mac_ip'][set].delete(data), machine)
+        self.test_mac_ip_dispatch(lambda set, data: self.ipset['mac_ip'][set].delete(data), machine)
 
     def test_mac_ip_dispatch(self, func, machine):
         """Détermine à quel set de mac-ip appliquer la fonction ``func`` (add, delete, append, ...)"""