diff --git a/docs/bundles.md b/docs/bundles.md
index a56adb020..193228242 100644
--- a/docs/bundles.md
+++ b/docs/bundles.md
@@ -196,3 +196,6 @@ A service has the following fields:
         deploying a bundle should create networks as needed.
     </dd>
 </dl>
+
+> **Note:** Some configuration options are not yet supported in the DAB format,
+> including volume mounts.