diff --git a/app/views/posts/_form.haml b/app/views/posts/_form.haml
index 2d27226..e7bd0a4 100644
--- a/app/views/posts/_form.haml
+++ b/app/views/posts/_form.haml
@@ -73,7 +73,7 @@
   .form-group
     = label_tag 'post_objetivos', t('posts.objetivos')
     = text_area 'post', 'objetivos', value: @post.get_front_matter(:objetivos),
-      class: 'form-control'
+      class: field_class
     %small.text-muted.form-text= t('posts.objetivos_help')
   .form-group
     = label_tag 'post_recomendaciones', t('posts.recomendaciones')