diff --git a/docs/src/pages/configurations/custom-webpack-config/index.md b/docs/src/pages/configurations/custom-webpack-config/index.md
index 9c461498db8a..c5457ac90232 100644
--- a/docs/src/pages/configurations/custom-webpack-config/index.md
+++ b/docs/src/pages/configurations/custom-webpack-config/index.md
@@ -97,6 +97,8 @@ Add following content to the `webpack.config.js` in your Storybook config direct
 > We plan to expose our default webpack-config as it's own package in the future.
 
 ```js
+const path = require('path');
+
 // load the default config generator.
 const genDefaultConfig = require('@storybook/react/dist/server/config/defaults/webpack.config.js');