diff --git a/workflow/engine/classes/model/Configuration.php b/workflow/engine/classes/model/Configuration.php
index d280727e0..a2a18a261 100755
--- a/workflow/engine/classes/model/Configuration.php
+++ b/workflow/engine/classes/model/Configuration.php
@@ -24,7 +24,9 @@
  *
  */
 
-//require_once 'classes/model/om/BaseConfiguration.php';
+if (!class_exists('BaseConfiguration')) {
+    require_once 'classes/model/om/BaseConfiguration.php';
+}
 //require_once 'classes/model/Content.php';