diff --git a/fsdev/Makefile.objs b/fsdev/Makefile.objs
index fb38017..24bbb3e 100644
--- a/fsdev/Makefile.objs
+++ b/fsdev/Makefile.objs
@@ -1,7 +1,10 @@
 # Lots of the fsdev/9pcode is pulled in by vl.c via qemu_fsdev_add.
 # only pull in the actual 9p backend if we also enabled virtio or xen.
-common-obj-$(call land,$(CONFIG_VIRTFS),$(call lor,$(CONFIG_VIRTIO),$(CONFIG_XEN))) = qemu-fsdev.o 9p-marshal.o 9p-iov-marshal.o
-common-obj-$(call lnot,$(call land,$(CONFIG_VIRTFS),$(call lor,$(CONFIG_VIRTIO),$(CONFIG_XEN)))) = qemu-fsdev-dummy.o
+ifeq ($(call land,$(CONFIG_VIRTFS),$(call lor,$(CONFIG_VIRTIO_9P),$(CONFIG_XEN))),y)
+common-obj-y = qemu-fsdev.o 9p-marshal.o 9p-iov-marshal.o
+else
+common-obj-y = qemu-fsdev-dummy.o
+endif
 common-obj-y += qemu-fsdev-opts.o qemu-fsdev-throttle.o
 
 # Toplevel always builds this; targets without virtio will put it in