diff --git a/lib/infobox/main.js b/lib/infobox/main.js
index 4e080a5..679f3cf 100644
--- a/lib/infobox/main.js
+++ b/lib/infobox/main.js
@@ -19,7 +19,7 @@ define(['infobox/link', 'infobox/node', 'infobox/location'], function (link, nod
       sidebar.hide();
 
       el = document.createElement('div');
-      sidebar.container.children[1].append(el);
+      sidebar.container.children[1].appendChild(el);
 
       el.scrollIntoView(false);
       el.classList.add('infobox');