diff --git a/gestion/ldap_crans.py b/gestion/ldap_crans.py
index b9e48449..20b89cff 100755
--- a/gestion/ldap_crans.py
+++ b/gestion/ldap_crans.py
@@ -2794,7 +2794,7 @@ class Machine(BaseClasseCrans):
         else:
             proprio = self.proprietaire()
 
-            if isinstance(proprio, Adherent) and proprio.adherentPayant():
+            if not isinstance(proprio, Adherent) or proprio.adherentPayant():
                 try:
                     net = config.NETs['adherents']
                     pool_ip = lister_ip_dispo('adherents')