diff --git a/lib/libutil/Makefile b/lib/libutil/Makefile
--- a/lib/libutil/Makefile
+++ b/lib/libutil/Makefile
@@ -9,7 +9,7 @@
 LIB=	util
 SHLIB_MAJOR= 10
 
-SRCS=	_secure_path.c auth.c cpuset.c expand_number.c flopen.c fparseln.c \
+SRCS=	_secure_path.c cpuset.c expand_number.c flopen.c fparseln.c \
 	ftime.c getlocalbase.c gr_util.c \
 	hexdump.c humanize_number.c kinfo_getfile.c \
 	kinfo_getallproc.c kinfo_getproc.c kinfo_getvmmap.c \
diff --git a/lib/libutil/Symbol.map b/lib/libutil/Symbol.map
--- a/lib/libutil/Symbol.map
+++ b/lib/libutil/Symbol.map
@@ -2,7 +2,6 @@
 	_secure_path;
 	auth_cat;
 	auth_checknologin;
-	auth_getval;
 	auth_hostok;
 	auth_timeok;
 	auth_ttyok;
diff --git a/lib/libutil/auth.c b/lib/libutil/auth.c
deleted file mode 100644
--- a/lib/libutil/auth.c
+++ /dev/null
@@ -1,44 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Simple authentication database handling code.
- *
- * Copyright (c) 1998
- *	Jordan Hubbard.  All rights reserved.
- *
- * 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,
- *    verbatim and that no modifications are made prior to this
- *    point in the file.
- * 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 HIS PETS 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, LIFE 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.
- */
-
-#include <sys/cdefs.h>
-#include <stdlib.h>
-
-#include <libutil.h>
-
-char *
-auth_getval(const char *name)
-{
-
-	(void)name;
-	return (NULL);
-}
diff --git a/lib/libutil/libutil.h b/lib/libutil/libutil.h
--- a/lib/libutil/libutil.h
+++ b/lib/libutil/libutil.h
@@ -86,7 +86,6 @@
 struct winsize;
 
 __BEGIN_DECLS
-char	*auth_getval(const char *_name);
 void	clean_environment(const char * const *_white,
 	    const char * const *_more_white);
 int	expand_number(const char *_buf, int64_t *_num);