diff --git a/workflow/engine/bin/cron.php b/workflow/engine/bin/cron.php
index b4556c3e6..84b89cf60 100755
--- a/workflow/engine/bin/cron.php
+++ b/workflow/engine/bin/cron.php
@@ -71,8 +71,11 @@ try {
     $classLoader->add(PATH_TRUNK . 'workflow' . PATH_SEP . 'engine' . PATH_SEP . 'src' . PATH_SEP, 'ProcessMaker');
     $classLoader->add(PATH_TRUNK . 'workflow' . PATH_SEP . 'engine' . PATH_SEP . 'src' . PATH_SEP);
 
+    $classLoader->addModelClassPath(PATH_TRUNK . 'workflow' . PATH_SEP . 'engine' . PATH_SEP . 'classes' . PATH_SEP . 'model' . PATH_SEP);
     //Load classes
+    G::LoadThirdParty('propel', 'Propel');
     G::LoadClass('system');
+    G::LoadClass('tasks');
 
     $arraySystemConfiguration = System::getSystemConfiguration();
 
diff --git a/workflow/engine/bin/cron_single.php b/workflow/engine/bin/cron_single.php
index 7e412a06e..422fc3f9f 100755
--- a/workflow/engine/bin/cron_single.php
+++ b/workflow/engine/bin/cron_single.php
@@ -67,6 +67,7 @@ try {
     //Load classes
     G::LoadThirdParty('pear/json', 'class.json');
     G::LoadThirdParty('smarty/libs', 'Smarty.class');
+    G::LoadThirdParty('propel', 'Propel');
     G::LoadSystem('error');
     G::LoadSystem('dbconnection');
     G::LoadSystem('dbsession');
@@ -86,6 +87,7 @@ try {
     G::LoadSystem('pagedTable');
     G::LoadSystem('httpProxyController');
     G::LoadClass('system');
+    G::LoadClass('tasks');
 
     require_once('propel/Propel.php');
     require_once('creole/Creole.php');