diff --git a/browser/main/index.js b/browser/main/index.js
index d36a4c9e..f75416c9 100644
--- a/browser/main/index.js
+++ b/browser/main/index.js
@@ -24,8 +24,9 @@ document.addEventListener('dragover', function (e) {
 })
 
 document.addEventListener('click', function (e) {
-  if (!e.target.className) return
-  const isInfoButton = e.target.className.includes('infoButton')
+  const className = e.target.className
+  if (!className && typeof(className) !== 'string') return
+  const isInfoButton = className.includes('infoButton')
   const isInfoPanel = e.target.offsetParent.className.includes('infoPanel')
   if (isInfoButton || isInfoPanel) return
   const infoPanel = document.querySelector('.infoPanel')