diff --git a/ChangeLog b/ChangeLog
index f27eedcf3..4614eb865 100755
--- a/ChangeLog
+++ b/ChangeLog
@@ -5,6 +5,10 @@ phpMyAdmin - ChangeLog
 $Id$
 $Source$
 
+2006-06-08 Marc Delisle  <lem9@users.sourceforge.net>
+    * libraries/header.inc.php: bug #1501891, undefined PMA_isSuperuser() when 
+      the default server is 0
+
 2006-06-06 Marc Delisle  <lem9@users.sourceforge.net>
     * Documentation.html: various fixes, thanks to Cedric Corazza
 
diff --git a/libraries/header.inc.php b/libraries/header.inc.php
index 17411032d..9d8c35a62 100644
--- a/libraries/header.inc.php
+++ b/libraries/header.inc.php
@@ -50,7 +50,8 @@ if (empty($GLOBALS['is_header_sent'])) {
                     (!empty($GLOBALS['cfg']['Server']['host']) ? $GLOBALS['cfg']['TitleServer'] :
                     $GLOBALS['cfg']['TitleDefault']))
                     );
-    $is_superuser    = PMA_isSuperuser();
+    // here, the function does not exist with this configuration: $cfg['ServerDefault'] = 0; 
+    $is_superuser    = function_exists('PMA_isSuperuser') && PMA_isSuperuser();
     ?>
     <script type="text/javascript" language="javascript">
     <!--