diff --git a/en_US.ISO8859-1/articles/pam/su.c b/en_US.ISO8859-1/articles/pam/su.c
index 8523123986..d0cc6e00d5 100644
--- a/en_US.ISO8859-1/articles/pam/su.c
+++ b/en_US.ISO8859-1/articles/pam/su.c
@@ -1,138 +1,139 @@
 /*-
  * Copyright (c) 2002 Networks Associates Technologies, Inc.
  * All rights reserved.
  *
  * This software was developed for the FreeBSD Project by ThinkSec AS and
  * NAI Labs, the Security Research Division of Network Associates, Inc.
  * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
  * DARPA CHATS research program.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. The name of the author may not be used to endorse or promote
  *    products derived from this software without specific prior written
  *    permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
  * $FreeBSD$
  */
 
 #include <sys/param.h>
 #include <sys/wait.h>
 
 #include <err.h>
 #include <stdio.h>
 #include <syslog.h>
 #include <unistd.h>
 
 #include <security/pam_appl.h>
 #include <security/pam_misc.h>
 
 static pam_handle_t *pamh;
 static struct pam_conv pamc;
 
 static void
 usage(void)
 {
         fprintf(stderr, "Usage: su [login [args]]\n");
         exit(1);
 }
 
 static int
 check(char *func, int pam_err)
 {
         if (pam_err == PAM_SUCCESS || pam_err == PAM_NEW_AUTHTOK_REQD)
                 return pam_err;
         openlog("su", LOG_CONS, LOG_AUTH);
         syslog(LOG_ERR, "%s(): %s", func, pam_strerror(pamh, pam_err));
         errx(1, "Sorry.");
 }
 
 int
 main(int argc, char *argv[])
 {
         char hostname[MAXHOSTNAMELEN];
         const char *user, *tty;
         int o, status;
         pid_t pid;
 
         while ((o = getopt(argc, argv, "h")) != -1)
                 switch (o) {
                 case 'h':
                 default:
                         usage();
                 }
 
         argc -= optind;
         argv += optind;
 
         if (argc > 0)
                 user = *argv;
         else
                 user = "root";
 
         /* initialize PAM */
         pamc.conv = &misc_conv;
         pam_start("su", user, &pamc, &pamh);
 
         /* set some items */
         gethostname(hostname, sizeof hostname);
         check("pam_set_item", pam_set_item(pamh, PAM_RHOST, hostname));
         user = getlogin();
         check("pam_set_item", pam_set_item(pamh, PAM_RUSER, user));
         tty = ttyname(STDERR_FILENO);
         check("pam_set_item", pam_set_item(pamh, PAM_TTY, tty));
 
         /* authenticate the applicant */
         check("pam_authenticate", pam_authenticate(pamh, 0));
         if (check("pam_acct_mgmt", pam_acct_mgmt(pamh, 0)) ==
             PAM_NEW_AUTHTOK_REQD)
                 check("pam_chauthtok",
                     pam_chauthtok(pamh, PAM_CHANGE_EXPIRED_AUTHTOK));
         
         /* establish the requested credentials */
         check("pam_setcred", pam_setcred(pamh, PAM_ESTABLISH_CRED));
         
         /* authentication succeeded; open a session */
         check("pam_open_session", pam_open_session(pamh, 0));
 
         switch ((pid = fork())) {
         case -1:
                 err(1, "fork()");
         case 0:
                 /* child: start a shell */
                 *argv = "/bin/sh";
                 execvp(*argv, argv);
                 err(1, "execvp()");
         default:
                 /* parent: wait for child to exit */
                 waitpid(pid, &status, 0);
                 if (WIFEXITED(status))
                         status = WEXITSTATUS(status);
                 else
                         status = 1;
         }
 
         /* close the session and release PAM resources */
         check("pam_close_session", pam_close_session(pamh, 0));
+        check("pam_setcred", pam_setcred(pamh, PAM_DELETE_CRED));
         check("pam_end", pam_end(pamh, 0));
 
         exit(status);
 }