diff --git a/lib/request.js b/lib/request.js
index 29dea1fb..c651d884 100644
--- a/lib/request.js
+++ b/lib/request.js
@@ -1,7 +1,7 @@
 'use strict'
 
 const DEV = process.env.NODE_ENV === 'dev'
-const DEBUG = process.env.NODE_DEBUG === 'hafas-client'
+const DEBUG = process.env.DEBUG === 'hafas-client'
 
 const {join} = require('path')
 const createHash = require('create-hash')