diff --git a/src/OAuth/OAuthRequest.php b/src/OAuth/OAuthRequest.php
index b7498f8..6e13262 100644
--- a/src/OAuth/OAuthRequest.php
+++ b/src/OAuth/OAuthRequest.php
@@ -39,7 +39,7 @@ public static function from_request($http_method = null, $http_url = null, $para
                 ? 'http'
                 : 'https';
       $http_url = ($http_url) ? $http_url : $scheme .
-                                '://' . $_SERVER['SERVER_NAME'] .
+                                '://' . $_SERVER['HTTP_HOST'] .
                                 ':' .
                                 $_SERVER['SERVER_PORT'] .
                                 $_SERVER['REQUEST_URI'];