diff --git a/wp-includes/class-IXR.php b/wp-includes/class-IXR.php
index ec3f70ca71..7cc4c20fb9 100644
--- a/wp-includes/class-IXR.php
+++ b/wp-includes/class-IXR.php
@@ -540,7 +540,6 @@ EOD;
             $xml = '<?xml version="1.0"?>'."\n".$xml;
         $length = strlen($xml);
         header('Connection: close');
-        header('Content-Length: '.$length);
         if ($charset)
             header('Content-Type: text/xml; charset='.$charset);
         else
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 0e5a563264..9742b455be 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-alpha-34570';
+$wp_version = '4.4-alpha-34571';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.