diff --git a/core/designdocument.class.inc.php b/core/designdocument.class.inc.php
index e7ece78b0..d8119ae94 100644
--- a/core/designdocument.class.inc.php
+++ b/core/designdocument.class.inc.php
@@ -30,6 +30,7 @@ use DOMDocument;
 use DOMFormatException;
 use IssueLog;
 use LogAPI;
+use utils;
 
 /**
  * Class \Combodo\iTop\DesignDocument