diff --git a/include/template.class.php b/include/template.class.php
index 2d40e52a1..6954f5f36 100644
--- a/include/template.class.php
+++ b/include/template.class.php
@@ -117,6 +117,7 @@ class Template
     $this->smarty->registerPlugin('modifier', 'in_array', 'in_array');
     $this->smarty->registerPlugin('modifier', 'ucfirst', 'ucfirst');
     $this->smarty->registerPlugin('modifier', 'strstr', 'strstr');
+    $this->smarty->registerPlugin('modifier', 'stristr', 'stristr');
     $this->smarty->registerPlugin('modifier', 'str_ireplace', 'str_ireplace');
     $this->smarty->registerPlugin('modifier', 'explode', array('Template', 'mod_explode') );
     $this->smarty->registerPlugin('modifier', 'ternary', array('Template', 'mod_ternary') );