Index: sys/sys/conf.h
===================================================================
--- sys/sys/conf.h
+++ sys/sys/conf.h
@@ -147,6 +147,23 @@
 #define	D_TTY	0x0004
 #define	D_MEM	0x0008	/* /dev/(k)mem */
 
+/* Defined uid and gid values. */
+#define		UID_ROOT	0
+#define		UID_BIN		3
+#define		UID_UUCP	66
+#define		UID_NOBODY	65534
+
+#define		GID_WHEEL	0
+#define		GID_KMEM	2
+#define		GID_TTY		4
+#define		GID_OPERATOR	5
+#define		GID_BIN		7
+#define		GID_GAMES	13
+#define		GID_VIDEO	44
+#define		GID_DIALER	68
+#define		GID_NOGROUP	65533
+#define		GID_NOBODY	65534
+
 #ifdef _KERNEL
 
 #define	D_TYPEMASK	0xffff
@@ -308,22 +325,6 @@
 
 ino_t	devfs_alloc_cdp_inode(void);
 void	devfs_free_cdp_inode(ino_t ino);
-
-#define		UID_ROOT	0
-#define		UID_BIN		3
-#define		UID_UUCP	66
-#define		UID_NOBODY	65534
-
-#define		GID_WHEEL	0
-#define		GID_KMEM	2
-#define		GID_TTY		4
-#define		GID_OPERATOR	5
-#define		GID_BIN		7
-#define		GID_GAMES	13
-#define		GID_VIDEO	44
-#define		GID_DIALER	68
-#define		GID_NOGROUP	65533
-#define		GID_NOBODY	65534
 
 typedef void (*dev_clone_fn)(void *arg, struct ucred *cred, char *name,
 	    int namelen, struct cdev **result);
Index: usr.sbin/mountd/mountd.c
===================================================================
--- usr.sbin/mountd/mountd.c
+++ usr.sbin/mountd/mountd.c
@@ -48,6 +48,7 @@
 __FBSDID("$FreeBSD: head/usr.sbin/mountd/mountd.c 349376 2019-06-25 17:00:53Z mav $");
 
 #include <sys/param.h>
+#include <sys/conf.h>
 #include <sys/fcntl.h>
 #include <sys/fnv_hash.h>
 #include <sys/linker.h>
@@ -1525,9 +1526,9 @@
 		 * Set defaults.
 		 */
 		has_host = FALSE;
-		anon.cr_uid = 65534;
+		anon.cr_uid = UID_NOBODY;
 		anon.cr_ngroups = 1;
-		anon.cr_groups[0] = 65533;
+		anon.cr_groups[0] = GID_NOGROUP;
 		exflags = MNT_EXPORTED;
 		got_nondir = 0;
 		opt_flags = 0;
@@ -3461,8 +3462,8 @@
 	/*
 	 * Set up the unprivileged user.
 	 */
-	cr->cr_uid = 65534;
-	cr->cr_groups[0] = 65533;
+	cr->cr_uid = UID_NOBODY;
+	cr->cr_groups[0] = GID_NOGROUP;
 	cr->cr_ngroups = 1;
 	/*
 	 * Get the user's password table entry.