diff --git a/4chan_x.user.js b/4chan_x.user.js
index 62e409baf..af34f52c8 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -1646,7 +1646,7 @@
         while ((reply = replies.pop()) && (reply.id > id)) {
           arr.push(reply.parentNode.parentNode.parentNode);
         }
-        ircScroll = conf['Scrolling'] && arr.length && (document.height - document.body.clientHeight - window.scrollY < 20);
+        ircScroll = conf['Scrolling'] && arr.length && (d.body.scrollHeight - d.body.clientHeight - window.scrollY < 20);
         updater.timer.textContent = '-' + conf['Interval'];
         if (conf['Verbose']) {
           updater.count.textContent = '+' + arr.length;
diff --git a/script.coffee b/script.coffee
index a3f24cb42..2c6023f03 100644
--- a/script.coffee
+++ b/script.coffee
@@ -1345,7 +1345,7 @@ updater =
       while (reply = replies.pop()) and (reply.id > id)
         arr.push reply.parentNode.parentNode.parentNode #table
 
-      ircScroll = conf['Scrolling'] && arr.length && (document.height - document.body.clientHeight - window.scrollY < 20)
+      ircScroll = conf['Scrolling'] && arr.length && (d.body.scrollHeight - d.body.clientHeight - window.scrollY < 20)
 
       updater.timer.textContent = '-' + conf['Interval']
       if conf['Verbose']