Index: startup.php
===================================================================
--- startup.php	(revision 13128)
+++ startup.php	(working copy)
@@ -54,6 +54,13 @@
 	$https_mark = getArrayValue($_SERVER, 'HTTPS');
 	safeDefine('PROTOCOL', ($https_mark == 'on') || ($https_mark == '1') ? 'https://' : 'http://');
 
+	$port = array_key_exists('HTTP_PORT', $_SERVER) ? $_SERVER['HTTP_PORT'] : false;
+
+	if ($port && ((PROTOCOL == 'http://' && $port != '80') || (PROTOCOL == 'https://' && $port != '443'))) {
+		// if non-standard port is used, then define it
+        define('PORT', $_SERVER['HTTP_PORT']);
+    }
+
 	safeDefine('APPLICATION_CLASS', isset($vars['ApplicationClass']) ? $vars['ApplicationClass'] : 'kApplication');
 	safeDefine('APPLICATION_PATH', isset($vars['ApplicationPath']) ? $vars['ApplicationPath'] : '/core/kernel/application.php');