diff --git a/src/wp-includes/category.php b/src/wp-includes/category.php
index d8423e8094..570009879c 100644
--- a/src/wp-includes/category.php
+++ b/src/wp-includes/category.php
@@ -1,8 +1,10 @@
 <?php
 /**
- * WordPress Category API
+ * Taxonomy API: Core category-specific functionality
  *
  * @package WordPress
+ * @subpackage Taxonomy
+ * @since 2.1.0
  */
 
 /** Core category functionality */