diff --git a/config/environments/development.rb b/config/environments/development.rb
index bb6b7a913f..bbac74b1a9 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -110,4 +110,6 @@ Discourse::Application.configure do
       Bullet.rails_logger = true
     end
   end
+
+  config.hosts << /\A(([a-z-]+)\.)*localhost(\:\d+)?\Z/
 end