diff --git a/app/controllers/cas.php b/app/controllers/cas.php
index 839eb1d469cadd42f454d4e35008c053a509248b..e12443c6286b6d55ed42a733cda1734ac13e41b4 100644
--- a/app/controllers/cas.php
+++ b/app/controllers/cas.php
@@ -12,7 +12,7 @@
  * @category    Stud.IP
  */
 
-require_once 'app/controllers/studip_controller.php';
+require_once 'composer/jasig/phpcas/CAS.php';
 require_once 'lib/classes/cas/CAS_PGTStorage_Cache.php';
 
 class CasController extends StudipController
diff --git a/lib/classes/auth_plugins/StudipAuthCAS.class.php b/lib/classes/auth_plugins/StudipAuthCAS.class.php
index 408da78f3ed9cca17b542cc0cd197c73f73dad7a..d28cc3e7711d041593aab71f1857fb90523f4334 100644
--- a/lib/classes/auth_plugins/StudipAuthCAS.class.php
+++ b/lib/classes/auth_plugins/StudipAuthCAS.class.php
@@ -10,6 +10,7 @@
 * @package
 */
 
+require_once 'composer/jasig/phpcas/CAS.php';
 require_once 'lib/classes/cas/CAS_PGTStorage_Cache.php';
 
 class StudipAuthCAS extends StudipAuthSSO {