diff --git a/README.rst b/README.rst
index bc963e8..3e38833 100644
--- a/README.rst
+++ b/README.rst
@@ -540,6 +540,9 @@
             kernel_package:
               enabled: true
               value 'linux-image-virtual-hwe-16.04'
+            # disable cloud-init rootfs resize to prserve disk size configured by MAAS
+            rootfs_resize:
+              disabled: true
 
 Single MAAS cluster service [multiple racks]