diff --git a/lib/nodelist.js b/lib/nodelist.js
index f1d1399..09a6b30 100644
--- a/lib/nodelist.js
+++ b/lib/nodelist.js
@@ -22,6 +22,7 @@ define(function () {
       var tr = document.createElement("tr")
       var th1 = document.createElement("th")
       th1.textContent = "Knoten"
+      th1.classList.add("sort-default")
       tr.appendChild(th1)
 
       var th2 = document.createElement("th")