diff --git a/GameEngine/Session.php b/GameEngine/Session.php
index 194f50a4..040a71ed 100755
--- a/GameEngine/Session.php
+++ b/GameEngine/Session.php
@@ -280,7 +280,7 @@ $session = new Session;
 $form = new Form;
 
 // if there is no user, we'd try to load messages for user with ID 0, which is wrong
-if ($_SESSION['id_user']) {
+if (!empty($_SESSION['id_user'])) {
     $message = new Message;
 }