diff --git a/sources/application/UI/Base/Component/Button/ButtonUIBlockFactory.php b/sources/application/UI/Base/Component/Button/ButtonUIBlockFactory.php
index 624acca97..fa03c643d 100644
--- a/sources/application/UI/Base/Component/Button/ButtonUIBlockFactory.php
+++ b/sources/application/UI/Base/Component/Button/ButtonUIBlockFactory.php
@@ -21,6 +21,7 @@ namespace Combodo\iTop\Application\UI\Base\Component\Button;
 
 use Combodo\iTop\Application\UI\Base\AbstractUIBlockFactory;
 use Dict;
+use utils;
 
 /**
  * Class ButtonUIBlockFactory