diff --git a/assets/js/just-the-docs.js b/assets/js/just-the-docs.js
index d8d1a51..f475a41 100644
--- a/assets/js/just-the-docs.js
+++ b/assets/js/just-the-docs.js
@@ -26,7 +26,7 @@ jtd.onReady = function(ready) {
 function initNav() {
   jtd.addEvent(document, 'click', function(e){
     var target = e.target;
-    while (target && target.classList && !target.classList.contains('nav-list-expander')) {
+    while (target && !(target.classList && target.classList.contains('nav-list-expander'))) {
       target = target.parentElement;
     }
     if (target) {