diff --git a/modules/system/system.admin.inc b/modules/system/system.admin.inc
index 8817118..348c50e 100644
--- a/modules/system/system.admin.inc
+++ b/modules/system/system.admin.inc
@@ -106,7 +106,12 @@ function system_admin_index() {
 }
 
 /**
- * Menu callback; displays a module's settings page.
+ * Displays the configuration overview page.
+ *
+ * This menu callback implementation is a legacy function that used to display
+ * the configuration overview page at admin/config. It is currently unused and
+ * will be removed in Drupal 8. The page at admin/config is now generated by
+ * system_admin_config_page().
  */
 function system_settings_overview() {
   // Check database setup if necessary