diff --git a/modules/monitoring/application/views/helpers/CheckSource.php b/modules/monitoring/application/views/helpers/CheckSource.php
deleted file mode 100644
index 55efcde56..000000000
--- a/modules/monitoring/application/views/helpers/CheckSource.php
+++ /dev/null
@@ -1,14 +0,0 @@
-<?php
-
-class Zend_View_Helper_CheckSource extends Zend_View_Helper_Abstract
-{
-    protected static $purifier;
-
-    public function checkSource($source)
-    {
-        if (empty($source)) {
-            return '';
-        }
-        return $this->view->escape($source);
-    }
-}
diff --git a/modules/monitoring/application/views/scripts/show/components/checksource.phtml b/modules/monitoring/application/views/scripts/show/components/checksource.phtml
index a0ea90ca5..921654eeb 100644
--- a/modules/monitoring/application/views/scripts/show/components/checksource.phtml
+++ b/modules/monitoring/application/views/scripts/show/components/checksource.phtml
@@ -1,7 +1,7 @@
-<?php if (! $object->check_source) return ?>
+<?php if (! isset($object->check_source) || ! $object->check_source) return ?>
 <tr>
   <th><?= $this->translate('Check Source') ?></th>
   <td>
-      <?= $this->checkSource($object->check_source) ?>
+      <?= $this->escape($object->check_source) ?>
   </td>
 </tr>