diff --git a/gestion/annuaires_pg.py b/gestion/annuaires_pg.py
index 90ca55fe..4a7fd263 100644
--- a/gestion/annuaires_pg.py
+++ b/gestion/annuaires_pg.py
@@ -15,7 +15,7 @@ def _need_conn(f):
     def first_connect(*args, **kwargs):
         global conn, def_failed
         if def_failed:
-            raise NameError
+            raise NameError("La connexion à la pase postgresql ne peut être établie.")
         attempts = 0
         while not conn or not attempts:
             if __name__.endswith('annuaires_pg_test'):