diff --git a/update.php b/update.php
index 4598e7c66..9c9c6ae8d 100755
--- a/update.php
+++ b/update.php
@@ -2,7 +2,8 @@
 <?php
 	define('DISABLE_SESSIONS', true);
 
-	chdir(dirname($_SERVER['SCRIPT_NAME']));
+	chdir(dirname(__FILE__));
+
 	require_once "functions.php";
 	require_once "sanity_check.php";
 	require_once "config.php";
diff --git a/update_daemon2.php b/update_daemon2.php
index 1b1044238..6ccdbcb10 100755
--- a/update_daemon2.php
+++ b/update_daemon2.php
@@ -4,6 +4,7 @@
 	// Some configurable variable may be found below.
 
 	declare(ticks = 1);
+	chdir(dirname(__FILE__));
 
 	define('DISABLE_SESSIONS', true);