diff --git a/src/yunohost/authenticators/ldap_admin.py b/src/yunohost/authenticators/ldap_admin.py
index 808497b31..dd6eec03e 100644
--- a/src/yunohost/authenticators/ldap_admin.py
+++ b/src/yunohost/authenticators/ldap_admin.py
@@ -21,7 +21,7 @@ class Authenticator(BaseAuthenticator):
         self.basedn = "dc=yunohost,dc=org"
         self.admindn = "cn=admin,dc=yunohost,dc=org"
 
-    def authenticate(self, credentials=None):
+    def _authenticate_credentials(self, credentials=None):
 
         # TODO : change authentication format
         # to support another dn to support multi-admins