diff --git a/docs/next.config.js b/docs/next.config.js
index 89a71893a7a..f1745c2b7ae 100644
--- a/docs/next.config.js
+++ b/docs/next.config.js
@@ -83,6 +83,7 @@ module.exports = withTM({
     LIB_VERSION: pkg.version,
     REACT_STRICT_MODE: reactStrictMode,
     FEEDBACK_URL: process.env.FEEDBACK_URL,
+    PULL_REQUEST: process.env.PULL_REQUEST === 'true',
     // #default-branch-switch
     SOURCE_CODE_ROOT_URL: 'https://github.com/mui/mui-toolpad/blob/master',
     SOURCE_CODE_REPO: 'https://github.com/mui/mui-toolpad',