diff --git a/includes/path.inc b/includes/path.inc
index 2bba38f6f4b1ab5567f3c66be9a830642144fb34..8c640520e1b02156c4918e041808f2e17b7a3bc9 100644
--- a/includes/path.inc
+++ b/includes/path.inc
@@ -235,6 +235,8 @@ function drupal_get_normal_path($path, $path_language = '') {
  * @param $index
  *   The index of the component, where each component is separated by a '/'
  *   (forward-slash), and where the first component has an index of 0 (zero).
+ * @param $path
+ *   A path to break into components. Defaults to the path of the current page.
  *
  * @return
  *   The component specified by $index, or NULL if the specified component was