diff --git a/app/controllers/usuaries_controller.rb b/app/controllers/usuaries_controller.rb
index 4db6aafd..716668a9 100644
--- a/app/controllers/usuaries_controller.rb
+++ b/app/controllers/usuaries_controller.rb
@@ -72,7 +72,7 @@ class UsuariesController < ApplicationController
     site_usuarie = SiteUsuarie.new(@site, current_usuarie)
     authorize site_usuarie
 
-    params[:invite_as] = invited_as :invite_as
+    params[:invite_as] = invite_as
 
     @policy = policy(site_usuarie)
   end
@@ -159,8 +159,12 @@ class UsuariesController < ApplicationController
   # cualquier cosa, usamos el privilegio menor.
   #
   # @return [String]
-  def invited_as(param_key = :invited_as)
-    Rol.role?(params[param_key]) ? params[param_key] : Rol::INVITADE
+  def invited_as
+    Rol.role?(params[:invited_as]) ? params[:invited_as] : Rol::INVITADE
+  end
+
+  def invite_as
+    Rol.role?(params[:invite_as].singularize) ? params[:invite_as] : Rol::INVITADE.pluralize
   end
 
   def site