diff --git a/ChangeLog b/ChangeLog
index 6069bfd2b..9a87b3cdb 100755
--- a/ChangeLog
+++ b/ChangeLog
@@ -5,6 +5,9 @@ phpMyAdmin - Changelog
 $Id$
 $Source$
 
+2002-07-05 Alexander M. Turek  <rabus@users.sourceforge.net>
+    * header.inc.php3: Tried to fix bug #571409 (Zend Accelerator problems).
+
 2002-07-05 Marc Delisle  <lem9@users.sourceforge.net>
     * Documentation.html: about html entities in translations
 
diff --git a/header.inc.php3 b/header.inc.php3
index 659c70c8a..ef2417175 100755
--- a/header.inc.php3
+++ b/header.inc.php3
@@ -5,8 +5,13 @@
 /**
  * Gets a core script and starts output buffering work
  */
-require('./libraries/common.lib.php3');
-require('./libraries/ob.lib.php3');
+if (function_exists('require_once')) {
+    require_once('./libraries/common.lib.php3');
+    require_once('./libraries/ob.lib.php3');
+} else {
+    require('./libraries/common.lib.php3');
+    require('./libraries/ob.lib.php3');
+}
 if ($GLOBALS['cfg']['OBGzip']) {
     $GLOBALS['ob_mode'] = PMA_outBufferModeGet();
     if ($GLOBALS['ob_mode']) {