diff --git a/src/cmd/ksh93/sh/xec.c b/src/cmd/ksh93/sh/xec.c

--- a/src/cmd/ksh93/sh/xec.c

+++ b/src/cmd/ksh93/sh/xec.c

@@ -3529,7 +3529,7 @@ int sh_funscope(int argn, char *argv[],int(*fun)(void*),void *arg,int execflg)

 	}

 	if(jmpval)

 		r=shp->exitval;

-	if(r>SH_EXITSIG && ((r&SH_EXITMASK)==SIGINT || ((r&SH_EXITMASK)==SIGQUIT)))

+	if(r>SH_EXITSIG && ((r&SH_EXITMASK)==SIGINT || ((r&SH_EXITMASK)==SIGQUIT) || (getenv("_AST_KSH_SIGNAL_BUBBLE"))))

 		kill(getpid(),r&SH_EXITMASK);

 	if(jmpval > SH_JMPFUN)

 	{