diff -up ksh-20130214/src/cmd/ksh93/sh/fault.c.nobomb ksh-20130214/src/cmd/ksh93/sh/fault.c
--- ksh-20130214/src/cmd/ksh93/sh/fault.c.nobomb	2013-03-20 09:56:30.247997758 +0100
+++ ksh-20130214/src/cmd/ksh93/sh/fault.c	2013-03-20 09:57:13.285343999 +0100
@@ -484,7 +484,7 @@ void sh_exit_20120720(Shell_t *shp,regis
 	if(pp && pp->mode>1)
 		cursig = -1;
 #ifdef SIGTSTP
-	if(shp->trapnote&SH_SIGTSTP)
+	if(shp->trapnote&SH_SIGTSTP && job.jobcontrol)
 	{
 		/* ^Z detected by the shell */
 		shp->trapnote = 0;