diff --git a/lib/conf.js b/lib/conf.js
index 64cd6b86a..8d2c9c615 100644
--- a/lib/conf.js
+++ b/lib/conf.js
@@ -241,7 +241,7 @@ config = require("nomnom").options({
     },
     noYslow: {
        flag: true,
-       help: 'Choose to run YSlow or not',
+       help: 'Set to true to turn of collecting metrics using YSlow.',
     },
     webpagetest: {
     metavar: '<FILE>',