diff --git a/includes/ajax.inc b/includes/ajax.inc
index 50e8e28..618df19 100644
--- a/includes/ajax.inc
+++ b/includes/ajax.inc
@@ -294,6 +294,7 @@ function ajax_render($commands = array()) {
 
   // Now add a command to merge changes and additions to Drupal.settings.
   $scripts = drupal_add_js();
+  drupal_alter('js', $scripts);
   if (!empty($scripts['settings'])) {
     $settings = $scripts['settings'];
     array_unshift($commands, ajax_command_settings(drupal_array_merge_deep_array($settings['data']), TRUE));