diff --git a/include/iscsi-private.h b/include/iscsi-private.h
index c836b0e..aa22a6f 100644
--- a/include/iscsi-private.h
+++ b/include/iscsi-private.h
@@ -391,6 +391,8 @@ void iscsi_tcp_free_pdu(struct iscsi_context *iscsi, struct iscsi_pdu *pdu);
 
 int iscsi_service_reconnect_if_loggedin(struct iscsi_context *iscsi);
 
+void iscsi_dump_pdu_header(struct iscsi_context *iscsi, unsigned char *data);
+
 struct iscsi_transport {
 	int (*connect)(struct iscsi_context *iscsi, union socket_address *sa, int ai_family);
 	int (*queue_pdu)(struct iscsi_context *iscsi, struct iscsi_pdu *pdu);
diff --git a/lib/iscsi-command.c b/lib/iscsi-command.c
index 2b33fe7..f5930b7 100644
--- a/lib/iscsi-command.c
+++ b/lib/iscsi-command.c
@@ -450,6 +450,9 @@ iscsi_process_scsi_reply(struct iscsi_context *iscsi, struct iscsi_pdu *pdu,
 				task->sense.key,
 				scsi_sense_ascq_str(task->sense.ascq),
 				task->sense.ascq);
+		if (task->sense.key == SCSI_SENSE_ILLEGAL_REQUEST) {
+			iscsi_dump_pdu_header(iscsi, pdu->outdata.data);
+		}
 		if (pdu->callback) {
 			pdu->callback(iscsi, SCSI_STATUS_CHECK_CONDITION, task,
 			              pdu->private_data);