diff --git a/app/javascript/retrospring/features/announcement/index.ts b/app/javascript/retrospring/features/announcement/index.ts
index 9b14eb4c..077bb4c9 100644
--- a/app/javascript/retrospring/features/announcement/index.ts
+++ b/app/javascript/retrospring/features/announcement/index.ts
@@ -7,7 +7,7 @@ export default (): void => {
   ]);
 
   document.querySelectorAll('.announcement').forEach(function (el: HTMLDivElement) {
-    if (!window.localStorage.getItem(el.dataset.announcementId)) {
+    if (!window.localStorage.getItem(`announcement${el.dataset.announcementId}`)) {
       el.classList.remove('d-none');
     }
   });