diff -up ksh-20120801/src/cmd/ksh93/sh/io.c.sufix ksh-20120801/src/cmd/ksh93/sh/io.c

--- ksh-20120801/src/cmd/ksh93/sh/io.c.sufix	2014-04-08 14:30:14.412343555 +0200

+++ ksh-20120801/src/cmd/ksh93/sh/io.c	2014-04-08 14:31:18.403876587 +0200

@@ -2144,6 +2144,7 @@ static int	io_prompt(Shell_t *shp,Sfio_t

 			}

 #endif	/* TIOCLBIC */

 			cp = sh_mactry(shp,nv_getval(sh_scoped(shp,PS1NOD)));

+			shp->exitval = 0;

 			for(;c= *cp;cp++)

 			{

 				if(c==HIST_CHAR)