diff --git a/src/wp-includes/feed-rss.php b/src/wp-includes/feed-rss.php
index 1650434405..a355a8af40 100644
--- a/src/wp-includes/feed-rss.php
+++ b/src/wp-includes/feed-rss.php
@@ -5,7 +5,7 @@
  * @package WordPress
  */
 
-header('Content-Type: ' . feed_content_type('rss-http') . '; charset=' . get_option('blog_charset'), true);
+header('Content-Type: ' . feed_content_type('rss') . '; charset=' . get_option('blog_charset'), true);
 $more = 1;
 
 echo '<?xml version="1.0" encoding="'.get_option('blog_charset').'"?'.'>'; ?>
diff --git a/src/wp-includes/feed-rss2-comments.php b/src/wp-includes/feed-rss2-comments.php
index 703fa87cfa..c8e8d498ea 100644
--- a/src/wp-includes/feed-rss2-comments.php
+++ b/src/wp-includes/feed-rss2-comments.php
@@ -5,7 +5,7 @@
  * @package WordPress
  */
 
-header('Content-Type: ' . feed_content_type('rss-http') . '; charset=' . get_option('blog_charset'), true);
+header('Content-Type: ' . feed_content_type('rss2') . '; charset=' . get_option('blog_charset'), true);
 
 echo '<?xml version="1.0" encoding="'.get_option('blog_charset').'"?'.'>';
 
diff --git a/src/wp-includes/feed-rss2.php b/src/wp-includes/feed-rss2.php
index 2390c2d957..c82fc63c56 100644
--- a/src/wp-includes/feed-rss2.php
+++ b/src/wp-includes/feed-rss2.php
@@ -5,7 +5,7 @@
  * @package WordPress
  */
 
-header('Content-Type: ' . feed_content_type('rss-http') . '; charset=' . get_option('blog_charset'), true);
+header('Content-Type: ' . feed_content_type('rss2') . '; charset=' . get_option('blog_charset'), true);
 $more = 1;
 
 echo '<?xml version="1.0" encoding="'.get_option('blog_charset').'"?'.'>';