diff --git a/umap/static/umap/js/modules/umap.js b/umap/static/umap/js/modules/umap.js
index b0696827..5c856185 100644
--- a/umap/static/umap/js/modules/umap.js
+++ b/umap/static/umap/js/modules/umap.js
@@ -596,7 +596,7 @@ export default class Umap extends ServerStored {
     const panes = this._leafletMap.getPane('overlayPane')
 
     this.datalayersIndex = []
-    for (const pane of panes) {
+    for (const pane of panes.children) {
       if (!pane.dataset || !pane.dataset.id) continue
       this.datalayersIndex.push(this.datalayers[pane.dataset.id])
     }