diff --git a/gestion/ldap_crans.py b/gestion/ldap_crans.py
index 2d5b10da..5ecb01a7 100755
--- a/gestion/ldap_crans.py
+++ b/gestion/ldap_crans.py
@@ -2160,7 +2160,8 @@ class Adherent(BaseProprietaire):
         # Création de l'alias canonique
         if self.nom() and self.prenom():
             a = '%s.%s' % (self.prenom().capitalize(), self.nom().capitalize())
-            self.canonical_alias(a)
+            if self.canonical_alias(a) == None:
+                self.canonical_alias(login)
 
         self._data['objectClass'] = ['adherent', 'cransAccount', 'posixAccount', 'shadowAccount']
         self._data['uid'] = [login]