diff -up yp-tools-2.12/src/yppasswd.c.adjunct yp-tools-2.12/src/yppasswd.c

--- yp-tools-2.12/src/yppasswd.c.adjunct	2012-04-23 13:17:47.000988833 +0200

+++ yp-tools-2.12/src/yppasswd.c	2012-04-23 13:18:01.209802938 +0200

@@ -449,7 +449,7 @@ verifypassword (struct passwd *pwd, char

   passwdlen = get_passwd_len (pwd->pw_passwd);

   if (pwd->pw_passwd[0] 

-      && 0 != strcmp (pwd->pw_passwd, "x") /* don't check shadow passwords */

+      && 0 != strcmp (pwd->pw_passwd, "##") /* don't check passwords using passwd.adjunct feature */

       && uid)

     {

       char *crypted = crypt(pwdstr, pwd->pw_passwd);