diff --git a/src/wp-includes/post-functions.php b/src/wp-includes/post-functions.php
index 34452c462e..2c4cda07ec 100644
--- a/src/wp-includes/post-functions.php
+++ b/src/wp-includes/post-functions.php
@@ -1411,6 +1411,7 @@ function get_post_type_labels( $post_type_object ) {
  *
  * @param object $object                  A custom-something object.
  * @param array  $nohier_vs_hier_defaults Hierarchical vs non-hierarchical default labels.
+ * @return object Object containing labels for the given custom-something object.
  */
 function _get_custom_object_labels( $object, $nohier_vs_hier_defaults ) {
 	$object->labels = (array) $object->labels;