diff --git a/lxc/grail/main.tf b/lxc/grail/main.tf
index e2af275..73f1550 100644
--- a/lxc/grail/main.tf
+++ b/lxc/grail/main.tf
@@ -30,7 +30,7 @@ resource "proxmox_virtual_environment_container" "example_template" {
   }
 
   mount_point {
-    datastore_id = var.datastore_id_media     # <- secondary disk
+    volume = var.datastore_id_media     # <- secondary disk
     size         = var.disk_size_gb_media     # in GB
   }