diff --git a/src/wp-admin/includes/upgrade.php b/src/wp-admin/includes/upgrade.php
index e09d42a2da..d4c0097de1 100644
--- a/src/wp-admin/includes/upgrade.php
+++ b/src/wp-admin/includes/upgrade.php
@@ -1663,13 +1663,13 @@ function upgrade_440() {
 }
 
 /**
- * Execute changes made in WordPress 4.5.0
+ * Executes changes made in WordPress 4.5.0.
  *
  * @ignore
  * @since 4.5.0
  *
- * @global int  $wp_current_db_version
- * @global wpdb $wpdb
+ * @global int  $wp_current_db_version Current database version.
+ * @global wpdb $wpdb                  WordPress database abstraction object.
  */
 function upgrade_450() {
 	global $wp_current_db_version, $wpdb;