diff --git a/config/unicorn.conf.rb b/config/unicorn.conf.rb
index 573a5ff659c..e5f5c4d112a 100644
--- a/config/unicorn.conf.rb
+++ b/config/unicorn.conf.rb
@@ -1,8 +1,8 @@
 # See http://unicorn.bogomips.org/Unicorn/Configurator.html
 
-if ENV["LOGSTASH_URI"]
+if ENV["LOGSTASH_UNICORN_URI"]
   require_relative '../lib/discourse_logstash_logger'
-  logger DiscourseLogstashLogger.logger(uri: ENV['LOGSTASH_URI'], type: :unicorn)
+  logger DiscourseLogstashLogger.logger(uri: ENV['LOGSTASH_UNICORN_URI'], type: :unicorn)
 end
 
 # enable out of band gc out of the box, it is low risk and improves perf a lot