diff --git a/feed.php b/feed.php
index 34ce23c89f052daf733184318f2ff24998dcb6d5..960131b1514eb3afcfe6aae1f9e02f5a3a3aef55 100644
--- a/feed.php
+++ b/feed.php
@@ -21,7 +21,7 @@ $opt = rss_parseOptions();
 // the feed is dynamic - we need a cache for each combo
 // (but most people just use the default feed so it's still effective)
 $cache = getCacheName(join('', array_values($opt)).$_SERVER['REMOTE_USER'], '.feed');
-$key   = join('', array_values($opt)).$_SERVER['REMOTE_USER'];
+$key   = join('', array_values($opt)).$_SERVER['REMOTE_USER'].$_SERVER['HTTP_HOST'].$_SERVER['SERVER_PORT'];
 $cache = new cache($key, '.feed');
 
 // prepare cache depends