diff --git a/canaille/app/flask.py b/canaille/app/flask.py
index f0e92747..ee080474 100644
--- a/canaille/app/flask.py
+++ b/canaille/app/flask.py
@@ -29,6 +29,9 @@ def current_user():
 
         session["user_id"].remove(user_id)
 
+    if "user_id" in session and not session["user_id"]:
+        del session["user_id"]
+
     return None