diff --git a/app/models/post/template_field.rb b/app/models/post/template_field.rb
index 890d8c28..b11f31c6 100644
--- a/app/models/post/template_field.rb
+++ b/app/models/post/template_field.rb
@@ -107,6 +107,20 @@ class Post
       contents.fetch('open', value.count < 2)
     end
 
+    # Determina si los valores del campo serán públicos después
+    #
+    # XXX Esto es solo una indicación, el theme Jekyll tiene que
+    # respetarlos por su lado luego
+    def public?
+      # Todos los campos son públicos a menos que se indique lo
+      # contrario
+      simple? || contents.fetch('public', true)
+    end
+
+    def private?
+      !public?
+    end
+
     def human
       h = key.humanize
       h = h + ' *' if required?
diff --git a/app/views/posts/_form.haml b/app/views/posts/_form.haml
index de6097d2..7e2b00d7 100644
--- a/app/views/posts/_form.haml
+++ b/app/views/posts/_form.haml
@@ -79,6 +79,8 @@
     - next unless type = template.type
     .form-group
       = label_tag "post_#{template}", template.help.present? ? template.help : template.human
+      - if template.private?
+        %small.text-muted.form-text.pull-right= t('posts.private')
       - name = "post[#{template}]"
       - value = @post.new? ? template.values : @post.get_front_matter(template)
       - case type
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 0a284415..d9b9573d 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -204,5 +204,6 @@ en:
       date: 'Post needs a valid date'
     invalid: 'This field is required!'
     open: 'Tip: You can add new options by typing them and pressing Enter'
+    private: 'The values of this field will remain private'
     select:
       placeholder: 'Type to filter available options'
diff --git a/config/locales/es.yml b/config/locales/es.yml
index cc46cdc8..a82e9404 100644
--- a/config/locales/es.yml
+++ b/config/locales/es.yml
@@ -200,5 +200,6 @@ es:
       date: 'Necesita una fecha'
     invalid: '¡Este campo es obligatorio!'
     open: 'Nota: Puedes agregar más opciones a medida que las escribes y presionas Entrar'
+    private: 'Los valores de este campo serán privados'
     select:
       placeholder: 'Empieza a escribir para filtrar las opciones disponibles'