diff --git a/4chan_x.user.js b/4chan_x.user.js
index 2f6499a53..c3d0ab3fd 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -592,6 +592,7 @@
     node: function(post) {
       var el, filter, firstThread, isOP, key, result, thisThread, value, _i, _len, _ref;
       if (post.isInlined) return;
+      post.isOP = post["class"] === 'op';
       isOP = post.isOP, el = post.el;
       for (key in Filter.filters) {
         value = Filter[key](post);
@@ -4008,7 +4009,6 @@
         "class": klass,
         id: node.getElementsByTagName('input')[0].name,
         threadId: g.THREAD_ID || $.x('ancestor::div[@class="thread"]', node).firstChild.id,
-        isOP: klass === 'op',
         isInlined: /\binline\b/.test(klass),
         filesize: node.getElementsByClassName('filesize')[0] || false,
         quotes: node.getElementsByClassName('quotelink'),
diff --git a/script.coffee b/script.coffee
index 3f0631cf0..30146cef2 100644
--- a/script.coffee
+++ b/script.coffee
@@ -524,6 +524,7 @@ Filter =
 
   node: (post) ->
     return if post.isInlined
+    post.isOP = post.class is 'op'
     {isOP, el} = post
     for key of Filter.filters
       value = Filter[key] post
@@ -3365,7 +3366,6 @@ Main =
       class:     klass
       id:        node.getElementsByTagName('input')[0].name
       threadId:  g.THREAD_ID or $.x('ancestor::div[@class="thread"]', node).firstChild.id
-      isOP:      klass is 'op'
       isInlined: /\binline\b/.test klass
       filesize:  node.getElementsByClassName('filesize')[0] or false
       quotes:    node.getElementsByClassName 'quotelink'