diff --git a/vue2/src/components/AForm.vue b/vue2/src/components/AForm.vue
index caf1198..7cb7072 100644
--- a/vue2/src/components/AForm.vue
+++ b/vue2/src/components/AForm.vue
@@ -29,7 +29,7 @@
       Envoyé événement personnalisé
     </button>
 
-    <button type="submit" :disabled="isInvalid">Envoyer</button>
+    <button type="submit" :disabled="$v.$invalid">Envoyer</button>
   </form>
 </template>
 
@@ -68,6 +68,7 @@ export default {
     }
 
     return {
+      lastname: {},
       firstname: {
         required,
       },