diff --git a/authshibboleth.php b/authshibboleth.php
index 8030d52..70a8b72 100644
--- a/authshibboleth.php
+++ b/authshibboleth.php
@@ -8,7 +8,7 @@ class authshibboleth extends auth
 {
   /** The parameters returned by Shibboleth server */
   public $lastnameParam = "sn";
-  public $firstnameParam = "givenname";
+  public $firstnameParam = "givenName";
   public $mailParam = "mail";
   public $otherFields = array ("ou", "o");
   public $urlAuthentificated = "";