diff --git a/core/includes/install.inc b/core/includes/install.inc
index 999a02b..9223b9c 100644
--- a/core/includes/install.inc
+++ b/core/includes/install.inc
@@ -429,9 +429,9 @@ function drupal_install_system() {
   module_list_reset();
   module_implements_reset();
 
-  // @todo PHP 5.3.9 changes the behavior of is_subclass_of() with respect to
-  //   autoloaders. To allow earlier versions to properly find system.module,
-  //   warm the module list cache.
+  // To ensure that the system module can be found by the plugin system, warm
+  // the module list cache.
+  // @todo Remove this in http://drupal.org/node/1798732.
   module_list();
   config_install_default_config('module', 'system');