--- a/arch/x86/xen/Kconfig	2009-05-02 17:25:29.000000000 +0100
+++ b/arch/x86/xen/Kconfig	2009-05-02 22:25:30.000000000 +0100
@@ -42,6 +42,7 @@
        bool "Enable support for Xen PCI passthrough devices"
        depends on XEN && PCI
        select PCI_XEN
+       select XEN_XENBUS_FRONTEND
        help
          Enable support for passing PCI devices through to
 	 unprivileged domains. (COMPLETELY UNTESTED)