diff --git a/src/vmm_mad/remotes/lib/vcenter_driver/virtual_machine_device/vm_disk.rb b/src/vmm_mad/remotes/lib/vcenter_driver/virtual_machine_device/vm_disk.rb
index b673d3e868..4756c58764 100644
--- a/src/vmm_mad/remotes/lib/vcenter_driver/virtual_machine_device/vm_disk.rb
+++ b/src/vmm_mad/remotes/lib/vcenter_driver/virtual_machine_device/vm_disk.rb
@@ -149,7 +149,7 @@ module VirtualMachineDevice
                 RbVmomi::VIM.VirtualMachineBootOptionsBootableCdromDevice()
             else
                 RbVmomi::VIM.VirtualMachineBootOptionsBootableDiskDevice(
-                    deviceKey => device.key
+                    deviceKey: device.key
                 )
             end
         end
diff --git a/src/vmm_mad/remotes/lib/vcenter_driver/virtual_machine_device/vm_nic.rb b/src/vmm_mad/remotes/lib/vcenter_driver/virtual_machine_device/vm_nic.rb
index 5a539ade9d..28ba02f49a 100644
--- a/src/vmm_mad/remotes/lib/vcenter_driver/virtual_machine_device/vm_nic.rb
+++ b/src/vmm_mad/remotes/lib/vcenter_driver/virtual_machine_device/vm_nic.rb
@@ -46,7 +46,7 @@ module VirtualMachineDevice
         def boot_dev
             RbVmomi::VIM
                 .VirtualMachineBootOptionsBootableEthernetDevice(
-                    deviceKey => key
+                    deviceKey: key
                 )
         end