--- gforth/machpc.fs.in	2007/03/25 21:30:59	1.16
+++ gforth/machpc.fs.in	2007/03/31 12:58:07	1.17
@@ -108,10 +108,11 @@ false DefaultValue peephole     \ enable
 
 true DefaultValue primcentric   \ enables primcentric code
 
+true DefaultValue f83headerstring
 
 true DefaultValue abranch       \ enables absolute branches
 
-false DefaultValue control-rack \ disable return stack use for control flow
+true DefaultValue control-rack  \ disable return stack use for control flow
 
 false DefaultValue crlf