diff --git a/update.php b/update.php
index 873928b66..e0c460273 100755
--- a/update.php
+++ b/update.php
@@ -2,15 +2,15 @@
 <?php
 	define('DISABLE_SESSIONS', true);
 
-	if (!defined('PHP_EXECUTABLE'))
-		define('PHP_EXECUTABLE', '/usr/bin/php');
-
 	require_once "functions.php";
 	require_once "sanity_check.php";
 	require_once "config.php";
 	require_once "db.php";
 	require_once "db-prefs.php";
 
+	if (!defined('PHP_EXECUTABLE'))
+		define('PHP_EXECUTABLE', '/usr/bin/php');
+
 	$op = $argv[1];
 
 	if (!$op || $op == "-help") {