--- class-http.php	2014-04-05 05:48:18.000000000 +0000
+++ class-http.php	2014-07-23 18:50:41.460291267 +0000
@@ -923,8 +923,10 @@
 
 		if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) )
 			$strHeaders .= 'Host: ' . $arrURL['host'] . ':' . $arrURL['port'] . "\r\n";
-		else
+		else if ( $arrURL['port'] == 80 || $arrURL['port'] == 443 )
 			$strHeaders .= 'Host: ' . $arrURL['host'] . "\r\n";
+		else
+			$strHeaders .= 'Host: ' . $arrURL['host'] . ':' . $arrURL['port'] . "\r\n";
 
 		if ( isset($r['user-agent']) )
 			$strHeaders .= 'User-agent: ' . $r['user-agent'] . "\r\n";