diff --git a/objets.py b/objets.py
index d0cf589..0a4dfd8 100644
--- a/objets.py
+++ b/objets.py
@@ -533,6 +533,8 @@ class CransLdapObject(object):
         try:
             for attribut in attrs_before_verif:
                 if attribut.unique and not attribut in self._modifs.get(attr, []):
+                    if not self.in_context:
+                        cranslib.deprecated.usage("Des locks ne devrait être ajoutés que dans un context manager", level=2)
                     self.conn.lockholder.addlock(attr, str(attribut), self.lockId)
                     locked.append((attr, str(attribut), self.lockId))
         except ldap_locks.LockError: