diff --git a/lib/moodlelib.php b/lib/moodlelib.php
index 88855b9f9a8..76ae27f78c1 100644
--- a/lib/moodlelib.php
+++ b/lib/moodlelib.php
@@ -4244,6 +4244,9 @@ function delete_user(stdClass $user) {
 
     // Now do a brute force cleanup.
 
+    // Remove user's calendar subscriptions.
+    $DB->delete_records('event_subscriptions', ['userid' => $user->id]);
+
     // Remove from all cohorts.
     $DB->delete_records('cohort_members', array('userid' => $user->id));