diff --git a/inc/instance-config.php b/inc/instance-config.php
index d74b97fd..2501e20f 100644
--- a/inc/instance-config.php
+++ b/inc/instance-config.php
@@ -122,6 +122,7 @@
 	$config['additional_javascript'][] = 'js/mobile-style.js';
 	$config['additional_javascript'][] = 'js/id_highlighter.js';
 	$config['additional_javascript'][] = 'js/id_colors.js';
+	$config['additional_javascript'][] = 'js/threadscroll.js';
 
 	$config['font_awesome_css'] = '//netdna.bootstrapcdn.com/font-awesome/4.0.3/css/font-awesome.css';