diff --git a/lib/adduser.js b/lib/adduser.js
index b65eee170bcc7..38520edb232e5 100644
--- a/lib/adduser.js
+++ b/lib/adduser.js
@@ -33,8 +33,9 @@ function adduser (args, cb) {
 
   log.disableProgress()
 
+  let auth
   try {
-    const auth = require('./auth/' + npm.config.get('auth-type'))
+    auth = require('./auth/' + npm.config.get('auth-type'))
   } catch (e) {
     return cb(new Error('no such auth module'))
   }