diff --git a/objets.py b/objets.py
index b2f6c8e..d14a922 100644
--- a/objets.py
+++ b/objets.py
@@ -1302,9 +1302,9 @@ class baseCert(CransLdapObject):
             self['crlUrl'] = crlUrl
 
 
-    def machine(self):
+    def machine(self, refresh=False):
         u"""Renvoie la machine du certificat"""
-        if not self._machine:
+        if refresh or not self._machine:
             self._machine = new_cransldapobject(self.conn, self.parent_dn, self.mode)
         return self._machine