diff --git a/lib/nvmf/ctrlr.c b/lib/nvmf/ctrlr.c
index df0f2de3d..d3cdd153a 100644
--- a/lib/nvmf/ctrlr.c
+++ b/lib/nvmf/ctrlr.c
@@ -1626,6 +1626,7 @@ spdk_nvmf_ctrlr_identify_ctrlr(struct spdk_nvmf_ctrlr *ctrlr, struct spdk_nvme_c
 	cdata->sgls.keyed_sgl = 1;
 	cdata->sgls.sgl_offset = 1;
 	cdata->fuses.compare_and_write = 0;
+	cdata->acwu = 1;
 	spdk_strcpy_pad(cdata->subnqn, subsystem->subnqn, sizeof(cdata->subnqn), '\0');
 
 	SPDK_DEBUGLOG(SPDK_LOG_NVMF, "ctrlr data: maxcmd 0x%x\n", cdata->maxcmd);
diff --git a/lib/nvmf/ctrlr_bdev.c b/lib/nvmf/ctrlr_bdev.c
index dc6b5d7fa..0cd046e9b 100644
--- a/lib/nvmf/ctrlr_bdev.c
+++ b/lib/nvmf/ctrlr_bdev.c
@@ -148,6 +148,7 @@ spdk_nvmf_bdev_ctrlr_identify_ns(struct spdk_nvmf_ns *ns, struct spdk_nvme_ns_da
 	nsdata->nuse = num_blocks;
 	nsdata->nlbaf = 0;
 	nsdata->flbas.format = 0;
+	nsdata->nacwu = spdk_bdev_get_acwu(bdev);
 	if (!dif_insert_or_strip) {
 		nsdata->lbaf[0].ms = spdk_bdev_get_md_size(bdev);
 		nsdata->lbaf[0].lbads = spdk_u32log2(spdk_bdev_get_block_size(bdev));