diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
index 569c4053eae7..be38b39242dc 100644
--- a/hw/virtio/vhost.c
+++ b/hw/virtio/vhost.c
@@ -131,6 +131,11 @@ static int vhost_sync_dirty_bitmap(struct vhost_dev *dev,
     }
     for (i = 0; i < dev->nvqs; ++i) {
         struct vhost_virtqueue *vq = dev->vqs + i;
+
+        if (!vq->used_phys && !vq->used_size) {
+            continue;
+        }
+
         vhost_dev_sync_region(dev, section, start_addr, end_addr, vq->used_phys,
                               range_get_last(vq->used_phys, vq->used_size));
     }
@@ -168,6 +173,11 @@ static uint64_t vhost_get_log_size(struct vhost_dev *dev)
     }
     for (i = 0; i < dev->nvqs; ++i) {
         struct vhost_virtqueue *vq = dev->vqs + i;
+
+        if (!vq->used_phys && !vq->used_size) {
+            continue;
+        }
+
         uint64_t last = vq->used_phys + vq->used_size - 1;
         log_size = MAX(log_size, last / VHOST_LOG_CHUNK + 1);
     }