diff --git a/include/scsi-lowlevel.h b/include/scsi-lowlevel.h
index 2908e33..06abde6 100644
--- a/include/scsi-lowlevel.h
+++ b/include/scsi-lowlevel.h
@@ -380,6 +380,8 @@ struct scsi_inquiry_standard {
 	int hisup;
 	int response_data_format;
 
+	int additional_length;
+
 	int sccs;
 	int acc;
 	int tpgs;
diff --git a/lib/scsi-lowlevel.c b/lib/scsi-lowlevel.c
index 92453df..0fa1795 100644
--- a/lib/scsi-lowlevel.c
+++ b/lib/scsi-lowlevel.c
@@ -477,6 +477,8 @@ scsi_inquiry_datain_unmarshall(struct scsi_task *task)
 		inq->hisup                  = !!(task->datain.data[3]&0x10);
 		inq->response_data_format   = task->datain.data[3]&0x0f;
 
+		inq->additional_length      = task->datain.data[4];
+
 		inq->sccs                   = !!(task->datain.data[5]&0x80);
 		inq->acc                    = !!(task->datain.data[5]&0x40);
 		inq->tpgs                   = (task->datain.data[5]>>4)&0x03;