diff --git a/01-frontend/src/helper/navbar/NavBar.tsx b/01-frontend/src/helper/navbar/NavBar.tsx
index cfd622b..5bd0d88 100644
--- a/01-frontend/src/helper/navbar/NavBar.tsx
+++ b/01-frontend/src/helper/navbar/NavBar.tsx
@@ -124,6 +124,9 @@ export default function NavBar() {
         if (user !== undefined && user !== null) {
             setAvatarName(user.email.toUpperCase());
         }
+        if (!user) {
+            setAvatarName('');
+        }
     }, [user]);
 
     const handleSearch = (_: React.SyntheticEvent, value: string | null) => {