diff --git a/lib/moodlelib.php b/lib/moodlelib.php
index 4a0cc815a3d..0093959dd20 100644
--- a/lib/moodlelib.php
+++ b/lib/moodlelib.php
@@ -2528,6 +2528,19 @@ function create_user_key($script, $userid, $instance=null, $iprestriction=null,
     return $key->value;
 }
 
+/**
+ * Delete the user's new private user access keys for a particular script.
+ *
+ * @global object
+ * @param string $script unique target identifier
+ * @param int $userid
+ * @return void
+ */
+function delete_user_key($script,$userid) {
+    global $DB;
+    $DB->delete_records('user_private_key', array('script'=>$script, 'userid'=>$userid));
+}
+
 /**
  * Gets a private user access key (and creates one if one doesn't exist).
  *
diff --git a/lib/rsslib.php b/lib/rsslib.php
index 0826e3cdb14..67bd403a68a 100644
--- a/lib/rsslib.php
+++ b/lib/rsslib.php
@@ -333,10 +333,9 @@ function rss_get_token($userid) {
     return get_user_key('rss', $userid);
 }
 
-/*function rss_update_token_last_access($userid) {
-    global $DB;
-    $DB->set_field('rss_tokens', 'lastaccess', time(), array('userid'=>$userid));
-}*/
+function rss_delete_token($userid) {
+    delete_user_key('rss', $userid);
+}
 
 // ===== This function are used to write XML tags =========
 // [stronk7]: They are similar to the glossary export and backup generation