diff --git a/plugins/cas_auth_unl/start.php b/plugins/cas_auth_unl/start.php
index 3f41e5d29181a980ccd62926fe41aae94ddae31c..461efe38e31b8c7a30f3945c8f562f906b1264b6 100644
--- a/plugins/cas_auth_unl/start.php
+++ b/plugins/cas_auth_unl/start.php
@@ -13,7 +13,7 @@
 
     require_once 'peoplefinder/include.php';
     
-    set_include_path(dirname(__FILE__).'/../../../lib/php'.get_include_path());
+    set_include_path(dirname(__FILE__).'/../../../lib/php'.PATH_SEPARATOR.get_include_path());
     // http://code.google.com/p/simplecas/
     require_once 'SimpleCAS/Autoload.php';
     require_once 'HTTP/Request2.php';
@@ -166,4 +166,4 @@ class elggSimpleCas {
 
     
 }
-?>
\ No newline at end of file
+?>