diff --git a/docs/headless-chrome.md b/docs/headless-chrome.md
index 3cacd05307f7..59b56ccaf2b0 100644
--- a/docs/headless-chrome.md
+++ b/docs/headless-chrome.md
@@ -75,7 +75,7 @@ const lighthouse = require('lighthouse');
 const chromeLauncher = require('lighthouse/chrome-launcher');
 
 function launchChromeAndRunLighthouse(url, flags = {}, config = null) {
-  return chromeLauncher.launch().then(chrome => {
+  return chromeLauncher.launch(flags).then(chrome => {
     flags.port = chrome.port;
     return lighthouse(url, flags, config).then(results =>
       chrome.kill().then(() => results));