diff --git a/build/pdp10-ka/gt40 b/build/pdp10-ka/gt40
index b5b39509..3568f757 100644
--- a/build/pdp10-ka/gt40
+++ b/build/pdp10-ka/gt40
@@ -22,6 +22,7 @@ set vt crt=vr14
 set vt scale=1
 set vt address=17772000
 set vt vec=320
+set vt keyboard=nospacewar
 dep sr 0
 set rom enabled
 set rom0 address=17766000
diff --git a/build/simh/gt40 b/build/simh/gt40
index 4d322c1e..6c4f4e24 100644
--- a/build/simh/gt40
+++ b/build/simh/gt40
@@ -22,6 +22,7 @@ set vt crt=vr14
 set vt scale=1
 set vt address=17772000
 set vt vec=320
+set vt keyboard=nospacewar
 dep sr 0
 set rom enabled
 set rom0 address=17766000
diff --git a/tools/sim-h b/tools/sim-h
index 9f064db5..39ab11cb 160000
--- a/tools/sim-h
+++ b/tools/sim-h
@@ -1 +1 @@
-Subproject commit 9f064db5613026c3badf1bfa94d92f850453ecf0
+Subproject commit 39ab11cbb7f9e5c922b9a2d309f6a9021ffdd563