--- ./modules/mod_auth_unix.c.ORIG        2022-08-23 07:12:06 +0000
+++ ./modules/mod_auth_unix.c     2022-08-23 07:15:10 +0000
@@ -756,6 +756,11 @@
   return PR_HANDLED(cmd);
 }

+ #if (defined(_AIX) && !defined(_AIX52))
+extern  int     loginrestrictions(char *, int, char *, char **);
+extern  int     passwdexpired(char *, char **);
+#endif
+
 MODRET pw_authz(cmd_rec *cmd) {
   time_t now;
   char *user, *cleartxt_passwd;