--- twitter_actions.module.orig	2009-05-19 21:44:20.000000000 +1000
+++ twitter_actions.module	2009-05-19 21:44:38.000000000 +1000
@@ -75,6 +75,8 @@
   $pass = $form_state['values']['password'];
   $name = $form_state['values']['screen_name'];
 
+  module_load_include('inc', 'twitter');
+
   $valid = twitter_authenticate($name, $pass);
   if (!$valid) {
     form_set_error('password', t('Twitter authentication failed. Please check your account name and try again.'));