diff --git a/iscsi-scst/kernel/isert-scst/iser_rdma.c b/iscsi-scst/kernel/isert-scst/iser_rdma.c
index 192494545..f38207573 100644
--- a/iscsi-scst/kernel/isert-scst/iser_rdma.c
+++ b/iscsi-scst/kernel/isert-scst/iser_rdma.c
@@ -198,8 +198,11 @@ static void isert_post_drain_rq(struct isert_connection *isert_conn)
 void isert_post_drain(struct isert_connection *isert_conn)
 {
 	if (!test_and_set_bit(ISERT_DRAIN_POSTED, &isert_conn->flags)) {
+		mutex_lock(&isert_conn->state_mutex);
+		isert_conn->state = ISER_CONN_CLOSING;
 		isert_post_drain_rq(isert_conn);
 		isert_post_drain_sq(isert_conn);
+		mutex_unlock(&isert_conn->state_mutex);
 	}
 }