diff --git a/config/environments/development.rb b/config/environments/development.rb
index 306bd99f25b..6c080046d7a 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -41,7 +41,9 @@ Discourse::Application.configure do
   BetterErrors::Middleware.allow_ip! ENV['TRUSTED_IP'] if ENV['TRUSTED_IP']
 
   config.load_mini_profiler = true
-  config.hosts << ENV['DISCOURSE_DEV_HOST'] if ENV['DISCOURSE_DEV_HOST']
+  if hosts = ENV['DISCOURSE_DEV_HOSTS']
+    config.hosts.concat(hosts.split(","))
+  end
 
   require 'middleware/turbo_dev'
   config.middleware.insert 0, Middleware::TurboDev