diff --git a/setup/modelfactory.class.inc.php b/setup/modelfactory.class.inc.php
index 4164bb468..6d6d1277d 100644
--- a/setup/modelfactory.class.inc.php
+++ b/setup/modelfactory.class.inc.php
@@ -1294,6 +1294,14 @@ EOF;
 }
 
 
+/**
+ * Allow the setup page to load and perform its checks (including the check about the required extensions)
+ */
+if (!class_exists('DOMElement'))
+{
+class DOMElement {function __construct(){throw new Exception('The dom extension is not enabled');}}
+}
+
 /**
  * MFElement: helper to read/change the DOM
  * @package ModelFactory
@@ -1779,6 +1787,14 @@ class MFElement extends DOMElement
 	 }	 	
 }
 
+/**
+ * Allow the setup page to load and perform its checks (including the check about the required extensions)
+ */
+if (!class_exists('DOMDocument'))
+{
+class DOMDocument {function __construct(){throw new Exception('The dom extension is not enabled');}}
+}
+
 /**
  * MFDocument - formating rules for XML input/output
  * @package ModelFactory