diff --git a/application/views/helpers/FormTriStateCheckbox.php b/application/views/helpers/FormTriStateCheckbox.php
index b69114a11..695c9af56 100644
--- a/application/views/helpers/FormTriStateCheckbox.php
+++ b/application/views/helpers/FormTriStateCheckbox.php
@@ -2,7 +2,7 @@
 // {{{ICINGA_LICENSE_HEADER}}}
 // {{{ICINGA_LICENSE_HEADER}}}
 
-use Zend_View_Helper_FormElement;
+use \Zend_View_Helper_FormElement;
 
 /**
  * Helper to generate a "datetime" element