diff --git a/docs/src/main/sphinx/object-storage/file-system-gcs.md b/docs/src/main/sphinx/object-storage/file-system-gcs.md
index 0a30c16d78c4..ce0ccc194e13 100644
--- a/docs/src/main/sphinx/object-storage/file-system-gcs.md
+++ b/docs/src/main/sphinx/object-storage/file-system-gcs.md
@@ -24,6 +24,9 @@ Storage file system support:
     all other properties.
 * - `gcs.project-id`
   - Identifier for the project on Google Cloud Storage.
+* - `azure.endpoint`
+  - Optional URL for the Google Cloud Storage endpoint. Configure this property
+    if your storage is accessed using a custom URL, for example `http://storage.example.com:8000`.
 * - `gcs.client.max-retries`
   - Maximum number of RPC attempts. Defaults to 20.
 * - `gcs.client.backoff-scale-factor`