diff --git a/lib/ilias_interface/IliasUser.php b/lib/ilias_interface/IliasUser.php
index c44b3ec149840a907ee0370cdd56b23852653e4f..bbd7ebe26dde2b2940f2718163fb0f5a2e4adc9d 100644
--- a/lib/ilias_interface/IliasUser.php
+++ b/lib/ilias_interface/IliasUser.php
@@ -16,8 +16,8 @@
 */
 class IliasUser
 {
-    const USER_TYPE_ORIGINAL= '1';
-    const USER_TYPE_CREATED= '0';
+    const USER_TYPE_ORIGINAL= 1;
+    const USER_TYPE_CREATED= 0;
 
     public $index;
     private $ilias_config;