diff --git a/build/mchn/DB/boot b/build/mchn/DB/boot
index e9d1d845..847d5e9a 100644
--- a/build/mchn/DB/boot
+++ b/build/mchn/DB/boot
@@ -7,7 +7,7 @@ at dz0 10004
 # VT52
 at dz0 line=7,10018
 # GT40
-at tty line=6,10019
+at dz0 line=6,10019
 set rp0 rp06
 at rp0 out/simh/rp0.dsk
 b rp0