diff --git a/include/class.client.php b/include/class.client.php
index d65b0eea7ceb9364cc0707e0f9e532525444b41e..570af7c14f7afbd2a72ee49cf673b5af92438e45 100644
--- a/include/class.client.php
+++ b/include/class.client.php
@@ -51,8 +51,8 @@ implements EmailContact {
 
     }
 
-    function getId() { return $this->user->getId(); }
-    function getEmail() { return $this->user->getEmail(); }
+    function getId() { return ($this->user) ? $this->user->getId() : null; }
+    function getEmail() { return ($this->user) ? $this->user->getEmail() : null; }
 
     function sendAccessLink() {
         global $ost;