diff --git a/options.js b/options.js
index a578168..e1b8b95 100644
--- a/options.js
+++ b/options.js
@@ -353,7 +353,7 @@ document.addEventListener("DOMContentLoaded", function () {
     .addEventListener("click", show_experimental);
 
   function eventCaller(event, className, funcName) {
-    if (!event.target.classList.contains(className)) {
+    if (!event.target.classList || !event.target.classList.contains(className)) {
       return;
     }
     funcName(event);