diff --git a/4chan_x.js b/4chan_x.js
index e1150692f..dd6690768 100644
--- a/4chan_x.js
+++ b/4chan_x.js
@@ -1930,7 +1930,7 @@
       if (root.className === 'inline') {
         return;
       }
-      tid = g.THREAD_ID || $.x('ancestor::div[@class="thread"]/div', root).id;
+      tid = g.THREAD_ID || $.x('ancestor::div[contains(@class,"thread")]/div', root).id;
       _ref = $$('a.quotelink', root);
       _results = [];
       for (_i = 0, _len = _ref.length; _i < _len; _i++) {
diff --git a/script.coffee b/script.coffee
index aefc659e8..d3e8bc57f 100644
--- a/script.coffee
+++ b/script.coffee
@@ -1521,7 +1521,7 @@ quoteOP =
     g.callbacks.push quoteOP.node
   node: (root) ->
     return if root.className is 'inline'
-    tid = g.THREAD_ID or $.x('ancestor::div[@class="thread"]/div', root).id
+    tid = g.THREAD_ID or $.x('ancestor::div[contains(@class,"thread")]/div', root).id
     for quote in $$ 'a.quotelink', root
       if quote.hash[1..] is tid
         quote.textContent += ' (OP)'