diff --git a/A2osX.S.txt b/A2osX.S.txt
index 780a0b92..0cc60091 100644
--- a/A2osX.S.txt
+++ b/A2osX.S.txt
@@ -1,4 +1,6 @@
 PR#3
+PREFIX /A2OSX.BOOT
+DELETE A2OSX.SYSTEM
 PREFIX /A2OSX.SRC
 NEW
 INC 1
@@ -6,7 +8,7 @@ AUTO 6
 				.LIST OFF
 				.OP	65C02
 				.OR	$2000
-				.TF /A2OSX.BOOT/A2OSX
+				.TF /A2OSX.BOOT/A2OSX.SYSTEM,TSYS
 *--------------------------------------
 				.INB INC/MACROS.I
 				.INB INC/A2OSX.I