diff --git a/src/public/javascripts/widgets/note_tree.js b/src/public/javascripts/widgets/note_tree.js
index 9c594803f..ff8e94a75 100644
--- a/src/public/javascripts/widgets/note_tree.js
+++ b/src/public/javascripts/widgets/note_tree.js
@@ -491,7 +491,7 @@ export default class NoteTreeWidget extends TabAwareWidget {
         }
 
         for (const noteId of loadResults.getNoteIds()) {
-            noteIdsToUpdate.push(noteId);
+            noteIdsToUpdate.add(noteId);
         }
 
         for (const noteId of noteIdsToReload) {