diff --git a/includes/classes/user.php b/includes/classes/user.php
index 34d20e1f..fefdc2c6 100644
--- a/includes/classes/user.php
+++ b/includes/classes/user.php
@@ -17,7 +17,9 @@ class User
     public function __construct(int $id = -1)
     {
         if (-1 === $id) {
-            $this->id = $_SESSION['user']['id'];
+            if (isset($_SESSION['user']['id'])) {
+                $this->id = $_SESSION['user']['id'];
+            }
         } else {
             $this->id = $id;
         }