diff --git a/share/etc/oned.conf b/share/etc/oned.conf
index a228fac53a..ac5e7fc92d 100644
--- a/share/etc/oned.conf
+++ b/share/etc/oned.conf
@@ -244,12 +244,23 @@ VM_MAD = [
 #        Valid actions: deploy, shutdown, cancel, save, restore, migrate, poll
 #        An example: "-l migrate,poll=poll_ganglia,save"
 #-------------------------------------------------------------------------------
+
+# Driver for Xen 3.x
 #VM_MAD = [
 #    name       = "xen",
 #    executable = "one_vmm_exec",
-#    arguments  = "-t 15 -r 0 xen",
-#    default    = "vmm_exec/vmm_exec_xen.conf",
+#    arguments  = "-t 15 -r 0 xen3",
+#    default    = "vmm_exec/vmm_exec_xen3.conf",
 #    type       = "xen" ]
+
+# Driver for Xen 4.x
+#VM_MAD = [
+#    name       = "xen",
+#    executable = "one_vmm_exec",
+#    arguments  = "-t 15 -r 0 xen4",
+#    default    = "vmm_exec/vmm_exec_xen4.conf",
+#    type       = "xen" ]
+
 #-------------------------------------------------------------------------------
 
 #-------------------------------------------------------------------------------