diff --git a/core/includes/bootstrap.inc b/core/includes/bootstrap.inc
index 9dd3f56..f703699 100644
--- a/core/includes/bootstrap.inc
+++ b/core/includes/bootstrap.inc
@@ -1706,7 +1706,8 @@ function drupal_get_messages($type = NULL, $clear_queue = TRUE) {
 /**
  * Gets the title of the current page.
  *
- * The title is displayed on the page and in the title bar.
+ * The title is displayed on the page and in the title bar. The result of this
+ * function is already sanitized and is safe to print to a browser directly.
  *
  * @return
  *   The current page's title.
@@ -1716,6 +1717,7 @@ function drupal_get_title() {
 
   // During a bootstrap, menu.inc is not included and thus we cannot provide a title.
   if (!isset($title) && function_exists('menu_get_active_title')) {
+    // Titles that come from a menu definition are not yet filtered.
     $title = check_plain(menu_get_active_title());
   }