diff --git a/docs/guide-pt-BR/start-forms.md b/docs/guide-pt-BR/start-forms.md
index 9376721..17db7d3 100644
--- a/docs/guide-pt-BR/start-forms.md
+++ b/docs/guide-pt-BR/start-forms.md
@@ -29,6 +29,7 @@ detalhes sobre convenção de nomenclatura dos arquivos de classes.
 
 namespace app\models;
 
+use Yii;
 use yii\base\Model;
 
 class EntryForm extends Model