diff --git a/lib/libypclnt/ypclnt.h b/lib/libypclnt/ypclnt.h
new file mode 100644
index 000000000000..76bca526c347
--- /dev/null
+++ b/lib/libypclnt/ypclnt.h
@@ -0,0 +1,61 @@
+/*-
+ * Copyright (c) 2002 Networks Associates Technology, 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _YPCLNT_H_INCLUDED
+
+typedef struct ypclnt ypclnt_t;
+struct ypclnt {
+	char	*domain;	/* Domain name */
+	char	*map;		/* Map name */
+	char	*server;	/* Server name */
+	char	*error;		/* Error message */
+};
+
+struct passwd;
+
+ypclnt_t	*ypclnt_new(const char *, const char *, const char *);
+void		 ypclnt_free(ypclnt_t *);
+void		 ypclnt_error(ypclnt_t *, const char *, const char *, ...);
+int		 ypclnt_connect(ypclnt_t *);
+int		 ypclnt_passwd(ypclnt_t *, const struct passwd *, const char *);
+
+#if defined(DEBUG) && defined(__GNUC__)
+#define YPCLNT_DEBUG(fmt...) warnx(__FUNCTION__ ": " fmt, ##fmt)
+#else
+#define YPCLNT_DEBUG(fmt...)
+#endif
+
+#endif