diff --git a/mod/scorm/db/upgrade.php b/mod/scorm/db/upgrade.php
index 0666353..1f988cb 100644
--- a/mod/scorm/db/upgrade.php
+++ b/mod/scorm/db/upgrade.php
@@ -20,6 +20,10 @@
 // Please do not forget to use upgrade_set_timeout()
 // before any action that may take longer time to finish.
 
+// workaround for missing define
+if(!defined('SCORM_TOC_DISABLED')) {
+	define('SCORM_TOC_DISABLED', 0);
+}
 /**
  * @global moodle_database $DB
  * @param int $oldversion