diff --git a/pm_email_notify/pm_email_notify.module b/pm_email_notify/pm_email_notify.module
index 0d872c5..5c674d2 100644
--- a/pm_email_notify/pm_email_notify.module
+++ b/pm_email_notify/pm_email_notify.module
@@ -117,6 +117,16 @@ function pm_email_notify_user_update(&$edit, $account, $category) {
 }
 
 /**
+ * Implements hook_user_delete().
+ */
+function pm_email_notify_user_delete($account) {
+  $uid = $account->uid;
+  db_delete('pm_email_notify')
+    ->condition('user_id', $uid)
+    ->execute();
+}
+
+/**
  * Implements hook_form_FORM_ID_alter().
  */
 function pm_email_notify_form_privatemsg_admin_settings_alter(&$form, &$form_state) {