diff --git a/src/layouts/CalculatorLayout.vue b/src/layouts/CalculatorLayout.vue
index 09c0741..590199f 100644
--- a/src/layouts/CalculatorLayout.vue
+++ b/src/layouts/CalculatorLayout.vue
@@ -10,7 +10,9 @@
     >
       <v-app-bar-nav-icon @click="drawer = !drawer" />
       <v-app-bar-title class="text-h6">
-        {{ menuItems[selectedIndex].title }}
+        <template v-if="menuItems.length > 0 && menuItems[selectedIndex]">
+          {{ menuItems[selectedIndex].title || $t('appTitle') }}
+        </template>
       </v-app-bar-title>
 
       <v-spacer />