diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 7d21cf9..6c3c2eb 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -163,6 +163,7 @@
 	KVM_MMIO_BUS,
 	KVM_PIO_BUS,
 	KVM_VIRTIO_CCW_NOTIFY_BUS,
+	KVM_FAST_MMIO_BUS,
 	KVM_NR_BUSES
 };