diff --git a/wp-includes/feed.php b/wp-includes/feed.php
index 988f6b22c6..1665cf59ba 100644
--- a/wp-includes/feed.php
+++ b/wp-includes/feed.php
@@ -140,6 +140,7 @@ function the_title_rss() {
  * @see get_the_content()
  *
  * @param string $feed_type The type of feed. rss2 | atom | rss | rdf
+ * @return string The filtered content.
  */
 function get_the_content_feed($feed_type = null) {
 	if ( !$feed_type )