diff --git a/classes/template.php b/classes/template.php
index 59bfffd..a0a3cea 100644
--- a/classes/template.php
+++ b/classes/template.php
@@ -109,7 +109,7 @@ class template {
      * @return string|void Can return the PDF in string format if specified.
      */
     public function generate_pdf(bool $preview = false, int $userid = null, bool $return = false) {
-        global $CFG, $DB, $USER;
+        global $CFG, $DB, $USER, $SITE;
 
         if (empty($userid)) {
             $user = $USER;