diff --git a/tools/python/xen/xend/XendAPIConstants.py b/tools/python/xen/xend/XendAPIConstants.py
index 875f948bcf..6d260d5939 100644
--- a/tools/python/xen/xend/XendAPIConstants.py
+++ b/tools/python/xen/xend/XendAPIConstants.py
@@ -73,3 +73,4 @@ XEN_API_BOOT_TYPE = [
 XEN_API_VBD_MODE = ['RO', 'RW']
 XEN_API_VDI_TYPE = ['system', 'user', 'ephemeral']
 XEN_API_DRIVER_TYPE = ['ioemu', 'paravirtualised']
+XEN_API_VBD_TYPE = ['CD', 'Disk']