diff --git a/constants/dss_equ.inc b/constants/dss_equ.inc
index d7790ec..4a840d8 100644
--- a/constants/dss_equ.inc
+++ b/constants/dss_equ.inc
@@ -70,6 +70,8 @@ Dss:
 .Get_D_T        EQU     #17
 .Put_D_T        EQU     #18
 .F_First        EQU     #19
+.F_First.FATname	EQU	0
+.F_First.DOSname	EQU	1
 	; from FAT
 	; .NAME:		BLOCK	8,' '			;+ #00 +00 NAME
 	; .EXT:			BLOCK	3,' '			;+ #08 +08 EXT