diff --git a/mod_form.php b/mod_form.php
index f5ae43a..b6609eb 100644
--- a/mod_form.php
+++ b/mod_form.php
@@ -299,7 +299,7 @@ public function data_preprocessing(&$defaultvalues) {
      * Add completion rules to form.
      * @return array
      */
-    public function add_completion_rules() {
+    public function mod_pcast_add_completion_rules() {
         $mform =& $this->_form;
         $group = array();
         $group[] =& $mform->createElement('checkbox', 'completionepisodesenabled', '',