diff --git a/docs/guides-search.md b/docs/guides-search.md
index c0b1c3365b..88b9bf10b6 100644
--- a/docs/guides-search.md
+++ b/docs/guides-search.md
@@ -17,6 +17,7 @@ const siteConfig = {
   algolia: {
     apiKey: 'my-api-key',
     indexName: 'my-index-name',
+    appId: 'app-id', // Optional, if you run the DocSearch crawler on your own
     algoliaOptions: {} // Optional, if provided by Algolia
   },
   ...