diff --git a/app/views/users.py b/app/views/users.py
index 68109c6c..e180b9a3 100644
--- a/app/views/users.py
+++ b/app/views/users.py
@@ -426,7 +426,7 @@ def create_user_form(user_name=None, edit=0, all_roles=True):
                 "input_type": "text",
                 "explanation": "facultatif" if not edit_only_roles else "",
                 "size": 36,
-                "allow_null": False,
+                "allow_null": True,
                 "readonly": edit_only_roles,
             },
         ),
diff --git a/sco_version.py b/sco_version.py
index f40a58f4..caf26ca9 100644
--- a/sco_version.py
+++ b/sco_version.py
@@ -1,7 +1,7 @@
 # -*- mode: python -*-
 # -*- coding: utf-8 -*-
 
-SCOVERSION = "9.4.64"
+SCOVERSION = "9.4.65"
 
 SCONAME = "ScoDoc"