diff --git a/common.php b/common.php
index da867ec16..d0ed644af 100644
--- a/common.php
+++ b/common.php
@@ -34,7 +34,7 @@ function g5_path()
     $document_root = str_replace($tilde_remove, '', $_SERVER['SCRIPT_FILENAME']);
     $pattern = '/' . preg_quote($document_root, '/') . '/i';
     $root = preg_replace($pattern, '', $result['path']);
-    $port = $_SERVER['SERVER_PORT'] != 80 ? ':'.$_SERVER['SERVER_PORT'] : '';
+    $port = ($_SERVER['SERVER_PORT'] == 80 || $_SERVER['SERVER_PORT'] == 443) ? '' : ':'.$_SERVER['SERVER_PORT'];
     $http = 'http' . ((isset($_SERVER['HTTPS']) && $_SERVER['HTTPS']=='on') ? 's' : '') . '://';
     $user = str_replace(preg_replace($pattern, '', $_SERVER['SCRIPT_FILENAME']), '', $_SERVER['SCRIPT_NAME']);
     $host = isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : $_SERVER['SERVER_NAME'];