Using Questionnaire 2013062000 and Moodle 2.5.1+ (20130823)

When visiting a students complete or outline report in a course, the page fails to completely load after it hits a Questionnaire. On Developer Debug the following message is logged:

[Sat Aug 24 21:06:52 2013] [warn] mod_fcgid: stderr: PHP Fatal error: Call to undefined function questionnaire_get_user_responses() in /var/www/vhosts/rjreynolds.org/httpdocs/moodle/mod/questionnaire/lib.php on line 224, referer: http://www.rjreynolds.org/moodle/user/view.php?id=579&course=14