diff --git a/sys/dev/virtio/mmio/virtio_mmio.h b/sys/dev/virtio/mmio/virtio_mmio.h
index 5eb56d860780..fa51714c719a 100644
--- a/sys/dev/virtio/mmio/virtio_mmio.h
+++ b/sys/dev/virtio/mmio/virtio_mmio.h
@@ -1,93 +1,93 @@
 /*-
  * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
  * All rights reserved.
  *
  * This software was developed by SRI International and the University of
  * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
  * ("CTSRD"), as part of the DARPA CRASH research programme.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
  * $FreeBSD$
  */
 
 #ifndef	_VIRTIO_MMIO_H
 #define	_VIRTIO_MMIO_H
 
 DECLARE_CLASS(vtmmio_driver);
 
 struct vtmmio_virtqueue;
 
 struct vtmmio_softc {
 	device_t			dev;
 	device_t			platform;
 	struct resource			*res[2];
 
 	uint64_t			vtmmio_features;
 	uint32_t			vtmmio_flags;
 	uint32_t			vtmmio_version;
 
 	/* This "bus" will only ever have one child. */
 	device_t			vtmmio_child_dev;
 	struct virtio_feature_desc	*vtmmio_child_feat_desc;
 
 	int				vtmmio_nvqs;
 	struct vtmmio_virtqueue		*vtmmio_vqs;
 	void				*ih;
 };
 
 int vtmmio_probe(device_t);
 int vtmmio_attach(device_t);
 
 #define	VIRTIO_MMIO_MAGIC_VALUE		0x000
 #define	VIRTIO_MMIO_VERSION		0x004
 #define	VIRTIO_MMIO_DEVICE_ID		0x008
 #define	VIRTIO_MMIO_VENDOR_ID		0x00c
 #define	VIRTIO_MMIO_HOST_FEATURES	0x010
 #define	VIRTIO_MMIO_HOST_FEATURES_SEL	0x014
 #define	VIRTIO_MMIO_GUEST_FEATURES	0x020
 #define	VIRTIO_MMIO_GUEST_FEATURES_SEL	0x024
 #define	VIRTIO_MMIO_GUEST_PAGE_SIZE	0x028	/* version 1 only */
 #define	VIRTIO_MMIO_QUEUE_SEL		0x030
 #define	VIRTIO_MMIO_QUEUE_NUM_MAX	0x034
 #define	VIRTIO_MMIO_QUEUE_NUM		0x038
 #define	VIRTIO_MMIO_QUEUE_ALIGN		0x03c	/* version 1 only */
 #define	VIRTIO_MMIO_QUEUE_PFN		0x040	/* version 1 only */
 #define	VIRTIO_MMIO_QUEUE_READY		0x044	/* requires version 2 */
 #define	VIRTIO_MMIO_QUEUE_NOTIFY	0x050
 #define	VIRTIO_MMIO_INTERRUPT_STATUS	0x060
 #define	VIRTIO_MMIO_INTERRUPT_ACK	0x064
 #define	VIRTIO_MMIO_STATUS		0x070
 #define	VIRTIO_MMIO_QUEUE_DESC_LOW	0x080	/* requires version 2 */
 #define	VIRTIO_MMIO_QUEUE_DESC_HIGH	0x084	/* requires version 2 */
 #define	VIRTIO_MMIO_QUEUE_AVAIL_LOW	0x090	/* requires version 2 */
 #define	VIRTIO_MMIO_QUEUE_AVAIL_HIGH	0x094	/* requires version 2 */
 #define	VIRTIO_MMIO_QUEUE_USED_LOW	0x0a0	/* requires version 2 */
 #define	VIRTIO_MMIO_QUEUE_USED_HIGH	0x0a4	/* requires version 2 */
-#define	VIRTIO_MMIO_CONFIG_GENERATION	0x100	/* requires version 2 */
+#define	VIRTIO_MMIO_CONFIG_GENERATION	0x0fc	/* requires version 2 */
 #define	VIRTIO_MMIO_CONFIG		0x100
 #define	VIRTIO_MMIO_MAGIC_VIRT		0x74726976
 #define	VIRTIO_MMIO_INT_VRING		(1 << 0)
 #define	VIRTIO_MMIO_INT_CONFIG		(1 << 1)
 #define	VIRTIO_MMIO_VRING_ALIGN		4096
 
 #endif /* _VIRTIO_MMIO_H */