diff --git a/lib/default-config.js b/lib/default-config.js
index 11b1a369c..8315ab775 100644
--- a/lib/default-config.js
+++ b/lib/default-config.js
@@ -164,6 +164,8 @@ module.exports = {
 
     /**
      * Override http module to allow using 3rd party server modules (such as http2)
+     * *Note*: these modules are not included in the Browsersync package - you need
+     * to 'npm install' any that you'd like to use.
      * @property httpModule
      * @type string
      * @default undefined