diff --git a/application/modules/requests/models/RequestModel.php b/application/modules/requests/models/RequestModel.php
index c3075066a150a4c8c4de47a2495b9e7a913a5db8..09aa5c140a047a8a490772e4709ccbd274892678 100644
--- a/application/modules/requests/models/RequestModel.php
+++ b/application/modules/requests/models/RequestModel.php
@@ -933,7 +933,7 @@ class Requests_RequestModel extends Unl_Model
     	if ($time > 0) {
     		return new Zend_Date($time);
     	}
-    	return null;
+    	return new Zend_Date(0);
     }
     
     public function getLastApprovalTimestamp()