diff --git a/4chan_x.user.js b/4chan_x.user.js
index 8cd5a2755..e6fadbab0 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -1622,7 +1622,7 @@
         return updater.interval = this.value = this.value.match(/\d+/)[0];
       },
       update: function() {
-        var arr, body, br, id, input, length, replies, reply, _i, _len, _ref, _ref2;
+        var arr, body, br, id, input, ircScroll, replies, reply, _i, _len, _ref, _ref2;
         if (this.status === 404) {
           updater.timer.textContent = '';
           updater.count.textContent = 404;
@@ -1649,11 +1649,11 @@
         while ((reply = replies.pop()) && (reply.id > id)) {
           arr.push(reply.parentNode.parentNode.parentNode);
         }
-        length = arr.length;
+        ircScroll = updater.ircUpd && arr.length && (document.height - document.body.clientHeight - window.scrollY - 20 <= 0);
         updater.timer.textContent = '-' + updater.interval;
         if (updater.verbose) {
-          updater.count.textContent = '+' + length;
-          if (length === 0) {
+          updater.count.textContent = '+' + arr.length;
+          if (arr.length === 0) {
             updater.count.className = '';
           } else {
             updater.count.className = 'new';
@@ -1662,7 +1662,7 @@
         while (reply = arr.pop()) {
           $.before(br, reply);
         }
-        if (updater.ircUpd && length) {
+        if (ircScroll) {
           return scrollTo(0, d.body.scrollHeight);
         }
       }
diff --git a/script.coffee b/script.coffee
index 1ef760fac..716a95438 100644
--- a/script.coffee
+++ b/script.coffee
@@ -1348,12 +1348,12 @@ updater =
       replies = $$ 'td[id]', body
       while (reply = replies.pop()) and (reply.id > id)
         arr.push reply.parentNode.parentNode.parentNode #table
-      length = arr.length
+      ircScroll = updater.ircUpd && arr.length && (document.height - document.body.clientHeight - window.scrollY - 20 <= 0)
 
       updater.timer.textContent = '-' + updater.interval
       if updater.verbose
-        updater.count.textContent = '+' + length
-        if length is 0
+        updater.count.textContent = '+' + arr.length
+        if arr.length is 0
           updater.count.className = ''
         else
           updater.count.className = 'new'
@@ -1361,7 +1361,7 @@ updater =
       #XXX add replies in correct order so backlinks resolve
       while reply = arr.pop()
         $.before br, reply
-      if updater.ircUpd && length
+      if ircScroll
         scrollTo 0, d.body.scrollHeight
 
   timeout: ->