diff --git a/iscsi-scst/kernel/isert-scst/iser.h b/iscsi-scst/kernel/isert-scst/iser.h
index 7b8c0536d..143d863c4 100644
--- a/iscsi-scst/kernel/isert-scst/iser.h
+++ b/iscsi-scst/kernel/isert-scst/iser.h
@@ -234,6 +234,7 @@ struct isert_device {
 	struct ib_device	*ib_dev;
 	struct ib_pd		*pd;
 	struct ib_mr		*mr;
+	u32			lkey;
 
 	struct list_head	devs_node;
 	/* conn_list and refcnt protected by dev_list_mutex */
diff --git a/iscsi-scst/kernel/isert-scst/iser_pdu.c b/iscsi-scst/kernel/isert-scst/iser_pdu.c
index 25ee75ddd..7a0810185 100644
--- a/iscsi-scst/kernel/isert-scst/iser_pdu.c
+++ b/iscsi-scst/kernel/isert-scst/iser_pdu.c
@@ -201,7 +201,7 @@ static int isert_alloc_for_rdma(struct isert_cmnd *pdu, int sge_cnt,
 		isert_wr_set_fields(&pdu->wr[i], isert_conn, pdu);
 
 	for (i = 0; i < sge_cnt; ++i)
-		pdu->sg_pool[i].lkey = isert_conn->isert_dev->mr->lkey;
+		pdu->sg_pool[i].lkey = isert_conn->isert_dev->lkey;
 
 	goto out;
 
diff --git a/iscsi-scst/kernel/isert-scst/iser_rdma.c b/iscsi-scst/kernel/isert-scst/iser_rdma.c
index 7699abc74..8c6424acf 100644
--- a/iscsi-scst/kernel/isert-scst/iser_rdma.c
+++ b/iscsi-scst/kernel/isert-scst/iser_rdma.c
@@ -1092,6 +1092,7 @@ static struct isert_device *isert_device_create(struct ib_device *ib_dev)
 	isert_dev->ib_dev = ib_dev;
 	isert_dev->pd = pd;
 	isert_dev->mr = mr;
+	isert_dev->lkey = mr->lkey;
 
 	INIT_LIST_HEAD(&isert_dev->conn_list);