diff --git a/htdocs/js/DragNDrop/dragndrop.js b/htdocs/js/DragNDrop/dragndrop.js
index 519a415cd..dc91f45b5 100644
--- a/htdocs/js/DragNDrop/dragndrop.js
+++ b/htdocs/js/DragNDrop/dragndrop.js
@@ -411,7 +411,7 @@
 			this.sortable = Sortable.create(this.ddList, options);
 		}
 
-		htmlBucket(label, removable, indices) {
+		htmlBucket(label, removable, indices = []) {
 			const bucketElement = document.createElement('div');
 			bucketElement.classList.add('dd-bucket');