diff --git a/iscsi-scst/kernel/isert-scst/iser_hdr.h b/iscsi-scst/kernel/isert-scst/iser_hdr.h
index bcaf64905..faef0e1f5 100644
--- a/iscsi-scst/kernel/isert-scst/iser_hdr.h
+++ b/iscsi-scst/kernel/isert-scst/iser_hdr.h
@@ -23,5 +23,13 @@ struct isert_hdr {
 
 #define ISER_HDRS_SZ		(sizeof(struct isert_hdr) + sizeof(struct iscsi_hdr))
 
+#define ISER_ZBVA_NOT_SUPPORTED         0x80
+#define ISER_SEND_W_INV_NOT_SUPPORTED   0x40
+
+struct isert_cm_hdr {
+	u8	flags;
+	u8	rsvd[3];
+} __packed;
+
 #endif
 
diff --git a/iscsi-scst/kernel/isert-scst/iser_rdma.c b/iscsi-scst/kernel/isert-scst/iser_rdma.c
index acf693705..1d39b8f7a 100644
--- a/iscsi-scst/kernel/isert-scst/iser_rdma.c
+++ b/iscsi-scst/kernel/isert-scst/iser_rdma.c
@@ -1187,6 +1187,7 @@ static int isert_cm_conn_req_handler(struct rdma_cm_id *cm_id,
 	struct isert_connection *isert_conn;
 	struct rdma_conn_param *ini_conn_param;
 	struct rdma_conn_param tgt_conn_param;
+	struct isert_cm_hdr cm_hdr = { 0 };
 	int err;
 
 	TRACE_ENTRY();
@@ -1235,6 +1236,10 @@ static int isert_cm_conn_req_handler(struct rdma_cm_id *cm_id,
 	if (tgt_conn_param.initiator_depth > ini_conn_param->initiator_depth)
 		tgt_conn_param.initiator_depth = ini_conn_param->initiator_depth;
 
+	tgt_conn_param.private_data_len = sizeof(cm_hdr);
+	tgt_conn_param.private_data = &cm_hdr;
+	cm_hdr.flags = ISER_ZBVA_NOT_SUPPORTED | ISER_SEND_W_INV_NOT_SUPPORTED;
+
 	err = rdma_accept(cm_id, &tgt_conn_param);
 	if (unlikely(err)) {
 		pr_err("Failed to accept conn request, err:%d\n", err);