diff --git a/quickstart/101-vm-cluster-linux/main.tf b/quickstart/101-vm-cluster-linux/main.tf
index 4acef897..45033d41 100644
--- a/quickstart/101-vm-cluster-linux/main.tf
+++ b/quickstart/101-vm-cluster-linux/main.tf
@@ -133,7 +133,7 @@ resource "azurerm_managed_disk" "test" {
   resource_group_name  = azurerm_resource_group.rg.name
   storage_account_type = "Standard_LRS"
   create_option        = "Empty"
-  disk_size_gb         = "1023"
+  disk_size_gb         = "1024"
 }
 
 resource "azurerm_virtual_machine_data_disk_attachment" "test" {