diff --git a/include/stdlib/sys/_types.h b/include/stdlib/sys/_types.h
new file mode 100644
index 0000000..c59afd3
--- /dev/null
+++ b/include/stdlib/sys/_types.h
@@ -0,0 +1,106 @@
+/*-
+ * Copyright (c) 2002 Mike Barcroft <mike@FreeBSD.org>
+ * 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.
+ * 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 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 _SYS__TYPES_H_
+#define _SYS__TYPES_H_
+
+#include <sys/cdefs.h>
+#include <machine/_types.h>
+
+/*
+ * Standard type definitions.
+ */
+typedef	__uint32_t	__blksize_t;	/* file block size */
+typedef	__int64_t	__blkcnt_t;	/* file block count */
+typedef	__int32_t	__clockid_t;	/* clock_gettime()... */
+typedef	__uint64_t	__cap_rights_t;	/* capability rights */
+typedef	__uint32_t	__fflags_t;	/* file flags */
+typedef	__uint64_t	__fsblkcnt_t;
+typedef	__uint64_t	__fsfilcnt_t;
+typedef	__uint32_t	__gid_t;
+typedef	__int64_t	__id_t;		/* can hold a gid_t, pid_t, or uid_t */
+typedef	__uint32_t	__ino_t;	/* inode number */
+typedef	long		__key_t;	/* IPC key (for Sys V IPC) */
+typedef	__int32_t	__lwpid_t;	/* Thread ID (a.k.a. LWP) */
+typedef	__uint16_t	__mode_t;	/* permissions */
+typedef	int		__accmode_t;	/* access permissions */
+typedef	int		__nl_item;
+typedef	__uint16_t	__nlink_t;	/* link count */
+typedef	__int64_t	__off_t;	/* file offset */
+typedef	__int32_t	__pid_t;	/* process [group] */
+typedef	__int64_t	__rlim_t;	/* resource limit - intentionally */
+					/* signed, because of legacy code */
+					/* that uses -1 for RLIM_INFINITY */
+typedef	__uint8_t	__sa_family_t;
+typedef	__uint32_t	__socklen_t;
+typedef	long		__suseconds_t;	/* microseconds (signed) */
+typedef	struct __timer	*__timer_t;	/* timer_gettime()... */
+typedef	struct __mq	*__mqd_t;	/* mq_open()... */
+typedef	__uint32_t	__uid_t;
+typedef	unsigned int	__useconds_t;	/* microseconds (unsigned) */
+typedef	int		__cpuwhich_t;	/* which parameter for cpuset. */
+typedef	int		__cpulevel_t;	/* level parameter for cpuset. */
+typedef int		__cpusetid_t;	/* cpuset identifier. */
+
+/*
+ * Unusual type definitions.
+ */
+/*
+ * rune_t is declared to be an ``int'' instead of the more natural
+ * ``unsigned long'' or ``long''.  Two things are happening here.  It is not
+ * unsigned so that EOF (-1) can be naturally assigned to it and used.  Also,
+ * it looks like 10646 will be a 31 bit standard.  This means that if your
+ * ints cannot hold 32 bits, you will be in trouble.  The reason an int was
+ * chosen over a long is that the is*() and to*() routines take ints (says
+ * ANSI C), but they use __ct_rune_t instead of int.
+ *
+ * NOTE: rune_t is not covered by ANSI nor other standards, and should not
+ * be instantiated outside of lib/libc/locale.  Use wchar_t.  wchar_t and
+ * rune_t must be the same type.  Also, wint_t must be no narrower than
+ * wchar_t, and should be able to hold all members of the largest
+ * character set plus one extra value (WEOF), and must be at least 16 bits.
+ */
+typedef	int		__ct_rune_t;	/* arg type for ctype funcs */
+typedef	__ct_rune_t	__rune_t;	/* rune_t (see above) */
+typedef	__ct_rune_t	__wchar_t;	/* wchar_t (see above) */
+typedef	__ct_rune_t	__wint_t;	/* wint_t (see above) */
+
+typedef	__uint32_t	__dev_t;	/* device number */
+
+typedef	__uint32_t	__fixpt_t;	/* fixed point number */
+
+/*
+ * mbstate_t is an opaque object to keep conversion state during multibyte
+ * stream conversions.
+ */
+typedef union {
+	char		__mbstate8[128];
+	__int64_t	_mbstateL;	/* for alignment */
+} __mbstate_t;
+
+#endif /* !_SYS__TYPES_H_ */