diff --git a/gestion/ldap_crans.py b/gestion/ldap_crans.py
index 5ecb01a7..a32cf451 100755
--- a/gestion/ldap_crans.py
+++ b/gestion/ldap_crans.py
@@ -2784,10 +2784,16 @@ class Machine(BaseClasseCrans):
             net = [ '0.0.0.0/0' ]
             pool_ip = lister_ip_dispo('all')
         else:
-            if self.proprietaire().adherentPayant():
+            gratuit = 0
+            proprio = self.proprietaire()
+            if isinstance(proprio, Adherent):
+                if not proprio.adherentPayant():
+                    gratuit = 1
+
+            if gratuit == 0:
                 try:
-                    net = config.NETs[self.proprietaire().chbre()[0].lower()]
-                    pool_ip = lister_ip_dispo(self.proprietaire().chbre()[0].lower())
+                    net = config.NETs[proprio.chbre()[0].lower()]
+                    pool_ip = lister_ip_dispo(proprio.chbre()[0].lower())
                 except:
                     raise RuntimeError(u'Impossible de trouver le réseau où placer la machine.')
             else: