diff --git a/lc_ldap.py b/lc_ldap.py
index 08f99a9..6e314db 100644
--- a/lc_ldap.py
+++ b/lc_ldap.py
@@ -538,7 +538,7 @@ class proprio(CransLdapObject):
 
     def machines(self):
         if not self._machines:
-            self._machines = self.conn.search_s('mid=*', dn = self.dn, scope = 1)
+            self._machines = self.conn.search('mid=*', dn = self.dn, scope = 1)
             for m in self._machines:
                 m._proprio = self
         return self._machines