diff --git a/lib/SimplePie/SimplePie/File.php b/lib/SimplePie/SimplePie/File.php
index 2f10efb4f..2b3377327 100644
--- a/lib/SimplePie/SimplePie/File.php
+++ b/lib/SimplePie/SimplePie/File.php
@@ -55,7 +55,7 @@
 class SimplePie_File
 {
 
-	const DEFAULT_HTTP_ACCEPT = 'application/atom+xml, application/rss+xml, application/rdf+xml;q=0.9, application/xml;q=0.8, text/xml;q=0.8, text/html;q=0.7, unknown/unknown;q=0.1, application/unknown;q=0.1, */*;q=0.1';
+	const DEFAULT_HTTP_ACCEPT = 'application/atom+xml, application/rss+xml, application/rdf+xml;q=0.9, application/xml;q=0.8, text/xml;q=0.7, text/html;q=0.6, text/plain;q=0.5, application/octet-stream;q=0.1';
 
 	var $url;
 	var $useragent;