diff --git a/lib/custom_logger.js b/lib/custom_logger.js
index 9169d51b970598fa3312cd0e897943dfba5e5973..bcb947f59e2addbfa6631ff30139b4b94bce8ef3 100644
--- a/lib/custom_logger.js
+++ b/lib/custom_logger.js
@@ -10,7 +10,7 @@
 var logger = require('express').logger;
 
 logger.format('default_bid',
-              ':remote-addr - - ":method :url HTTP/:http-version" :status :res[content-length] ":referrer" ":user-agent"');
+              ':remote-addr - - ":method :url HTTP/:http-version" :status :response-time :res[content-length] ":referrer" ":user-agent"');
 
 logger.format('dev_bid', ':method :url :status :response-time');