diff --git a/sys/cam/scsi/scsi_all.h b/sys/cam/scsi/scsi_all.h
index 72d9d1555151..3e24ae106d4b 100644
--- a/sys/cam/scsi/scsi_all.h
+++ b/sys/cam/scsi/scsi_all.h
@@ -1288,7 +1288,7 @@ struct scsi_vpd_id_descriptor
 #define	SCSI_PROTO_SSA		0x02
 #define	SCSI_PROTO_1394		0x03
 #define	SCSI_PROTO_RDMA		0x04
-#define SCSI_PROTO_iSCSI	0x05
+#define	SCSI_PROTO_ISCSI	0x05
 #define	SCSI_PROTO_SAS		0x06
 #define	SCSI_PROTO_ADT		0x07
 #define	SCSI_PROTO_ATA		0x08