diff --git a/include/scsi-lowlevel.h b/include/scsi-lowlevel.h
index cce9eda..a7144f1 100644
--- a/include/scsi-lowlevel.h
+++ b/include/scsi-lowlevel.h
@@ -558,6 +558,11 @@ struct scsi_inquiry_block_limits {
 	int ugavalid;
 	uint32_t unmap_gran_align;		/* unmap_granularity_alignment */
 	uint64_t max_ws_len;			/* maximum_write_same_length */
+
+	/* SBC-4 */
+	uint32_t max_atomic_xfer_len;
+	uint32_t atomic_align;
+	uint32_t atomic_gran;
 };
 
 struct scsi_inquiry_block_device_characteristics {
diff --git a/lib/scsi-lowlevel.c b/lib/scsi-lowlevel.c
index f2ff815..f39b0fb 100644
--- a/lib/scsi-lowlevel.c
+++ b/lib/scsi-lowlevel.c
@@ -1427,6 +1427,10 @@ scsi_inquiry_unmarshall_block_limits(struct scsi_task *task)
 	inq->max_ws_len            = (inq->max_ws_len << 32)
 				   	| task_get_uint32(task, 40);
 
+	inq->max_atomic_xfer_len   = task_get_uint32(task, 44);
+	inq->atomic_align          = task_get_uint32(task, 48);
+	inq->atomic_gran           = task_get_uint32(task, 52);
+
 	return inq;
 }