diff --git a/www/code/inner.js b/www/code/inner.js
index 2eb433c01..d74513035 100644
--- a/www/code/inner.js
+++ b/www/code/inner.js
@@ -257,8 +257,8 @@ define([
                 'class': 'cp-splitter'
             }).appendTo($previewContainer);
 
-            $preview.on('scroll', function() {
-                splitter.css('top', $preview.scrollTop() + 'px');
+            $previewContainer.on('scroll', function() {
+                splitter.css('top', $previewContainer.scrollTop() + 'px');
             });
 
             var $target = $codeMirrorContainer;