1 files changed, 1 insertions, 1 deletions

diff --git a/src/dumbymap.mjs b/src/dumbymap.mjs
index bb3737b..3200a05 100644
--- a/src/dumbymap.mjs
+++ b/src/dumbymap.mjs
@@ -543,7 +543,7 @@ export const generateMaps = (container, {
       menu.remove()
     }
     container.appendChild(menu)
-    new MutationObserver(() => {
+    new window.MutationObserver(() => {
       menu.style.display = 'block'
       menu.style.left = (e.clientX - menu.offsetParent.offsetLeft + 10) + 'px'
       menu.style.top = (e.clientY - menu.offsetParent.offsetTop + 5) + 'px'