diff --git a/src/app/pages/events/event-detail/event-detail.page.html b/src/app/pages/events/event-detail/event-detail.page.html
index 9900deffd..10217c523 100644
--- a/src/app/pages/events/event-detail/event-detail.page.html
+++ b/src/app/pages/events/event-detail/event-detail.page.html
@@ -16,11 +16,15 @@
   <div *ngIf="loadedEvent">
     <ion-item-group>
       <ion-item-sliding>
-        <form [formGroup]="ionicForm" (ngSubmit)="submitForm()" novalidate>
+        <form [formGroup]="ionicForm" novalidate>
           <ion-item>
             <ion-label position="stacked">Assunto</ion-label>
-            <ion-input [(ngModel)]="loadedEvent.Subject"></ion-input>
+            <ion-input [(ngModel)]="loadedEvent.Subject" formControlName="subject" type="text" required></ion-input>
           </ion-item>
+          <!-- Error messages -->
+          <span class="error ion-padding" *ngIf="errorControl.subject.errors?.required">
+            Campo obrigatório
+          </span>          
         </form>
         <ion-item>
           <ion-label position="stacked">Descrição</ion-label>