diff --git a/gestion/gen_confs/dhcpd_new.py b/gestion/gen_confs/dhcpd_new.py
index 9c24f367..b86b1479 100644
--- a/gestion/gen_confs/dhcpd_new.py
+++ b/gestion/gen_confs/dhcpd_new.py
@@ -36,6 +36,8 @@ class dydhcp:
         @raises OmapiError:
         @raises socket.error:
         """
+        if '<automatique>' in [ip, mac]:
+            return
         msg = OmapiMessage.open(b"host")
         msg.message.append((b"create", struct.pack("!I", 1)))
         msg.message.append((b"exclusive", struct.pack("!I", 1)))
@@ -56,6 +58,8 @@ class dydhcp:
         @raises OmapiError:
         @raises socket.error:
         """
+        if '<automatique>' in [ip, mac]:
+            return
         msg = OmapiMessage.open(b"host")
         msg.obj.append((b"hardware-address", pack_mac(mac)))
         msg.obj.append((b"hardware-type", struct.pack("!I", 1)))
@@ -147,7 +151,8 @@ class dhcp(gen_config) :
         for machine in self.machines :
             self.anim.cycle()
             for net in self.reseaux.keys() :
-                if machine.ip() != '<automatique>' and AddrInNet(machine.ip(), net) :
+                if '<automatique>' not in [machine.ip(), machine.mac()] and \
+                   AddrInNet(machine.ip(), net):
                     host_template = self.host_template
                     # variable pour remplir le template
                     #d = { 'nom' : machine.nom().split('.')[0] , 'mac' : machine.mac() , 'ip' : machine.ip() }