diff --git a/sys/dev/virtio/block/virtio_blk.c b/sys/dev/virtio/block/virtio_blk.c
index 28a363b88e0..0cfebf1d724 100644
--- a/sys/dev/virtio/block/virtio_blk.c
+++ b/sys/dev/virtio/block/virtio_blk.c
@@ -710,7 +710,8 @@ vtblk_alloc_disk(struct vtblk_softc *sc, struct virtio_blk_config *blkcfg)
 		dp->d_fwheads = blkcfg->geometry.heads;
 	}
 
-	if (virtio_with_feature(dev, VIRTIO_BLK_F_TOPOLOGY)) {
+	if (virtio_with_feature(dev, VIRTIO_BLK_F_TOPOLOGY) &&
+	    blkcfg->topology.physical_block_exp > 0) {
 		dp->d_stripesize = dp->d_sectorsize *
 		    (1 << blkcfg->topology.physical_block_exp);
 		dp->d_stripeoffset = (dp->d_stripesize -