diff --git a/app/auth/cas.py b/app/auth/cas.py
index d9b2a08f..352b4815 100644
--- a/app/auth/cas.py
+++ b/app/auth/cas.py
@@ -42,6 +42,11 @@ def after_cas_login():
                 current_app.logger.info(
                     f"""CAS login denied for {user.user_name if user else ""} cas_id={cas_id} (unknown or inactive)"""
                 )
+        else:
+            current_app.logger.info(
+                f"""CAS attribute '{ScoDocSiteConfig.get("cas_attribute_id")}' not found !
+                    (check your ScoDoc config)"""
+            )
 
     # Echec:
     flash("échec de l'authentification")