diff --git a/hw/block/xen_disk.c b/hw/block/xen_disk.c
index 1bbc111939bf76574dd80623a4a896c3bb050848..4869518fdd3ad783e2481b7647c2183401f7ed0a 100644
--- a/hw/block/xen_disk.c
+++ b/hw/block/xen_disk.c
@@ -576,7 +576,9 @@ static int ioreq_runio_qemu_aio(struct ioreq *ioreq)
         }
 
         block_acct_start(blk_get_stats(blkdev->blk), &ioreq->acct,
-                         ioreq->v.size, BLOCK_ACCT_WRITE);
+                         ioreq->v.size,
+                         ioreq->req.operation == BLKIF_OP_WRITE ?
+                         BLOCK_ACCT_WRITE : BLOCK_ACCT_FLUSH);
         ioreq->aio_inflight++;
         blk_aio_writev(blkdev->blk, ioreq->start / BLOCK_SIZE,
                        &ioreq->v, ioreq->v.size / BLOCK_SIZE,