diff --git a/src/wp-includes/taxonomy.php b/src/wp-includes/taxonomy.php
index f8bc57d039..9ebc9d0d0b 100644
--- a/src/wp-includes/taxonomy.php
+++ b/src/wp-includes/taxonomy.php
@@ -3993,7 +3993,7 @@ function get_the_taxonomies( $post = 0, $args = array() ) {
  * @since 2.5.0
  *
  * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post.
- * @return array
+ * @return array An array of all taxonomy names for the given post.
  */
 function get_post_taxonomies( $post = 0 ) {
 	$post = get_post( $post );