--- src/cmd/ksh93/edit/history.c
+++ src/cmd/ksh93/edit/history.c	2010-10-21 10:35:05.567927921 +0000
@@ -394,6 +394,7 @@ retry:
 			}
 			if(fd>=0)
 			{
+				fcntl(fd,F_SETFD,FD_CLOEXEC);
 				hp->tty = strdup(ttyname(2));
 				hp->auditfp = sfnew((Sfio_t*)0,NULL,-1,fd,SF_WRITE);
 			}