diff --git a/lib/trento/application/integration/discovery/policies/host_policy.ex b/lib/trento/application/integration/discovery/policies/host_policy.ex
index c7a9734afd..a98131a43f 100644
--- a/lib/trento/application/integration/discovery/policies/host_policy.ex
+++ b/lib/trento/application/integration/discovery/policies/host_policy.ex
@@ -112,6 +112,7 @@ defmodule Trento.Integration.Discovery.HostPolicy do
               vm_size: vm_size,
               data_disk_number:
                 case storage_profile do
+                  %{data_disks: nil} -> 0
                   %{data_disks: data_disks} -> length(data_disks)
                   _ -> 0
                 end,