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)