diff --git a/objets.py b/objets.py
index 01fd579..64295bc 100644
--- a/objets.py
+++ b/objets.py
@@ -611,6 +611,9 @@ class CransLdapObject(object):
         for attribut in self._modifs.get(attr, []):
             if attribut.unique and not attribut in attrs_before_verif and not attribut in attribut.unique_exclue:
                 self.conn.lockholder.removelock(attr, str(attribut), self.lockId)
+            # Si on remet la valeur antérieure au lock, on le libère
+            if not attribut.concurent and self._modifs.get(attr, []) != self.attrs.get(attr, []) and attrs_before_verif == self.attrs.get(attr, []):
+                self.conn.lockholder.removelock("dn", "%s_%s" % (self.dn.replace('=', '-').replace(',','_'), attr), self.lockId)
 
         # On met à jour self._modifs avec les nouvelles valeurs
         self._modifs[attr] = attrs_before_verif