diff --git a/app/models/site.rb b/app/models/site.rb
index eb47398..b9b134c 100644
--- a/app/models/site.rb
+++ b/app/models/site.rb
@@ -108,7 +108,7 @@ class Site < ApplicationRecord
   #
   # @return Array
   def urls(slash: true)
-    alternative_urls << url(slash: slash)
+    alternative_urls(slash: slash) << url(slash: slash)
   end
 
   def invitade?(usuarie)