diff --git a/mod/forum/mod.html b/mod/forum/mod.html
index 7381cc741ee..f8b00222315 100644
--- a/mod/forum/mod.html
+++ b/mod/forum/mod.html
@@ -1,4 +1,6 @@
 <?php
+    include_once($CFG->dirroot.'/mod/forum/lib.php');
+
     if (!isset($form->name)) {
         $form->name = '';
     }