diff --git a/public/js/syncscroll.js b/public/js/syncscroll.js
index 4773df1..231f141 100644
--- a/public/js/syncscroll.js
+++ b/public/js/syncscroll.js
@@ -28,7 +28,6 @@ md.renderer.rules.list_item_open = function (tokens, idx, options, env, self) {
     if (tokens[idx].map) {
         var startline = tokens[idx].map[0] + 1;
         var endline = tokens[idx].map[1];
-        tokens[idx].attrJoin('class', 'part');
         tokens[idx].attrJoin('data-startline', startline);
         tokens[idx].attrJoin('data-endline', endline);
     }