diff --git a/app/controllers/posts_controller.rb b/app/controllers/posts_controller.rb
index 6f84c911..a4b47a16 100644
--- a/app/controllers/posts_controller.rb
+++ b/app/controllers/posts_controller.rb
@@ -167,6 +167,6 @@ class PostsController < ApplicationController
   # Instruye al editor a olvidarse el contenido del artículo.  Usar
   # cuando hayamos guardado la información correctamente.
   def forget_content
-    flash[:js] = { target: 'editor', action: 'forget-content', keys: params[:storage_keys].to_json }
+    flash[:js] = { target: 'editor', action: 'forget-content', keys: (params[:storage_keys] || []).to_json }
   end
 end