diff --git a/src/accounting/static/js/drag-and-drop-reorder.js b/src/accounting/static/js/drag-and-drop-reorder.js
index 10f5106..e2b17c1 100644
--- a/src/accounting/static/js/drag-and-drop-reorder.js
+++ b/src/accounting/static/js/drag-and-drop-reorder.js
@@ -91,7 +91,7 @@ function initializeTouchDragAndDropReordering(list, onReorder) {
  * @param target {Element} the other item that was dragged over
  */
 function onDragOver(dragged, target) {
-    if (target.parentElement !== dragged.parentElement || target === dragged) {
+    if (dragged === null || target.parentElement !== dragged.parentElement || target === dragged) {
         return;
     }
     let isBefore = false;