diff --git a/modules/system/page.tpl.php b/modules/system/page.tpl.php
index e474a22fdb370ade3999aa55761a09978652656e..3f7440b140cf43bba38d545b3703e7c69f0ba9e0 100644
--- a/modules/system/page.tpl.php
+++ b/modules/system/page.tpl.php
@@ -12,13 +12,14 @@
  *   least, this will always default to /.
  * - $directory: The directory the template is located in, e.g. modules/system
  *   or themes/garland.
- * - $is_front: TRUE if the current page is the front page. Used to toggle the mission statement.
+ * - $is_front: TRUE if the current page is the front page.
  * - $logged_in: TRUE if the user is registered and signed in.
  * - $is_admin: TRUE if the user has permission to access administration pages.
  *
  * Site identity:
  * - $front_page: The URL of the front page. Use this instead of $base_path,
- *   when linking to the front page. This includes the language domain or prefix.
+ *   when linking to the front page. This includes the language domain or
+ *   prefix.
  * - $logo: The path to the logo image, as defined in theme configuration.
  * - $site_name: The name of the site, empty when display has been disabled
  *   in theme settings.
@@ -34,12 +35,17 @@
  *
  * Page content (in order of occurrence in the default page.tpl.php):
  * - $title: The page title, for use in the actual HTML content.
- * - $messages: HTML for status and error messages. Should be displayed prominently.
+ * - $messages: HTML for status and error messages. Should be displayed
+ *   prominently.
  * - $tabs (array): Tabs linking to any sub-pages beneath the current page
  *   (e.g., the view and edit tabs when displaying a node).
  * - $action_links (array): Actions local to the page, such as 'Add menu' on the
  *   menu administration interface.
  * - $feed_icons: A string of all feed icons for the current page.
+ * - $node: The node object, if there is an automatically-loaded node
+ *   associated with the page, and the node ID is the second argument
+ *   in the page's path (e.g. node/12345 and node/12345/revisions, but not
+ *   comment/reply/12345).
  *
  * Regions:
  * - $page['help']: Dynamic help text, mostly for admin pages.