diff --git a/vars.tf b/vars.tf
index 4a2526d1f3002a7f8652c740c5d0dcc460b16f55..11d61852277b38cd42cb3e6681e16849317b11b1 100644
--- a/vars.tf
+++ b/vars.tf
@@ -25,7 +25,7 @@ variable "external_network" {default = "dmznet"}
 variable "ohpc_user" {default = "centos"}
 variable "ood_user" {default = "centos"}
 variable "ssh_private_key" {default = "~/.ssh/id_rsa"}
-
+variable "data_volume" {default = ""}
 
 # variables for node creation module
 variable "image_compute" {default = "compute-v1"}