diff -u b/plugins/openid_connect_client/generic/OpenIDConnectClientGeneric.class.php b/plugins/openid_connect_client/generic/OpenIDConnectClientGeneric.class.php
--- b/plugins/openid_connect_client/generic/OpenIDConnectClientGeneric.class.php
+++ b/plugins/openid_connect_client/generic/OpenIDConnectClientGeneric.class.php
@@ -59,13 +59,13 @@
   /**
    * End User Session in IdP
    *
-   * @see https://openid.net/specs/openid-connect-session-1_0-28.html
-   * @see https://openid.net/specs/openid-connect-session-1_0-28.html#RedirectionAfterLogout
-   *
    * @param $id_token
    *   A NON-expired id_token (RECOMMENDED)
    * @param $post_logout_redirect_url
    *   Logout url registered on the IdP.
+   *
+   * @see https://openid.net/specs/openid-connect-session-1_0-28.html
+   * @see https://openid.net/specs/openid-connect-session-1_0-28.html#RedirectionAfterLogout
    */
   public function endSession($id_token, $post_logout_redirect_url = '') {
     $endpoints = $this->getEndpoints();