diff --git a/includes/common.inc b/includes/common.inc
index 5c6d86d7e51cfc2fba689bde6deaa4a6059e7064..8276576e05b8901412106f9fdde37a51ace4a3a7 100644
--- a/includes/common.inc
+++ b/includes/common.inc
@@ -3995,7 +3995,8 @@ function drupal_region_class($region) {
  * actually needed.
  *
  * @param $data
- *   (optional) If given, the value depends on the $options parameter:
+ *   (optional) If given, the value depends on the $options parameter, or
+ *   $options['type'] if $options is passed as an associative array:
  *   - 'file': Path to the file relative to base_path().
  *   - 'inline': The JavaScript code that should be placed in the given scope.
  *   - 'external': The absolute path to an external JavaScript file that is not