diff --git a/core/Objects/User.class.php b/core/Objects/User.class.php
index fd0cf36..ec7d05d 100644
--- a/core/Objects/User.class.php
+++ b/core/Objects/User.class.php
@@ -20,7 +20,7 @@ class User extends ApiObject {
   private ?Session $session;
   private int $uid;
   private string $username;
-  private string $email;
+  private ?string $email;
   private Language $language;
   private array $groups;