diff --git a/builder/xenserver/iso/builder.go b/builder/xenserver/iso/builder.go
index 4276cd0..03f26cf 100644
--- a/builder/xenserver/iso/builder.go
+++ b/builder/xenserver/iso/builder.go
@@ -308,6 +308,9 @@ func (self *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (pa
 		&xscommon.StepDetachVdi{
 			VdiUuidKey: "iso_vdi_uuid",
 		},
+		&xscommon.StepDetachVdi{
+			VdiUuidKey: "isoname_vdi_uuid",
+		},
 		&xscommon.StepDetachVdi{
 			VdiUuidKey: "tools_vdi_uuid",
 		},