diff --git a/app/templates/server/config/environment/index.js b/app/templates/server/config/environment/index.js
index 3b95a6203..cf873728d 100644
--- a/app/templates/server/config/environment/index.js
+++ b/app/templates/server/config/environment/index.js
@@ -44,19 +44,19 @@ var all = {
   facebook: {
     clientID:     process.env.FACEBOOK_ID || 'id',
     clientSecret: process.env.FACEBOOK_SECRET || 'secret',
-    callbackURL:  process.env.DOMAIN || '' + '/auth/facebook/callback'
+    callbackURL:  (process.env.DOMAIN || '') + '/auth/facebook/callback'
   },
 <% } if(filters.twitterAuth) { %>
   twitter: {
     consumerKey:     process.env.TWITTER_ID || 'id',
     consumerSecret: process.env.TWITTER_SECRET || 'secret',
-    callbackURL:  process.env.DOMAIN || '' + '/auth/twitter/callback'
+    callbackURL:  (process.env.DOMAIN || '') + '/auth/twitter/callback'
   },
 <% } if(filters.googleAuth) { %>
   google: {
     clientID:     process.env.GOOGLE_ID || 'id',
     clientSecret: process.env.GOOGLE_SECRET || 'secret',
-    callbackURL:  process.env.DOMAIN || '' + '/auth/google/callback'
+    callbackURL:  (process.env.DOMAIN || '') + '/auth/google/callback'
   }<% } %>
 };
 
@@ -64,4 +64,4 @@ var all = {
 // ==============================================
 module.exports = _.merge(
   all,
-  require('./' + process.env.NODE_ENV + '.js') || {});
\ No newline at end of file
+  require('./' + process.env.NODE_ENV + '.js') || {});