diff --git a/htdocs/admin/system/index.php b/htdocs/admin/system/index.php
index ea434ef12c0..93b870a521e 100644
--- a/htdocs/admin/system/index.php
+++ b/htdocs/admin/system/index.php
@@ -32,7 +32,7 @@
 //session_register("fix_left_menu");
 
 //include_once("../../allpre.inc.php");
-include_once("./pre.inc.php");
+require("./pre.inc.php");
 
 llxHeader();