diff --git a/libc/include/limits.h b/libc/include/limits.h
index a1124b3..a25eb65 100644
--- a/libc/include/limits.h
+++ b/libc/include/limits.h
@@ -33,10 +33,15 @@
  */
 
 #ifndef _LIMITS_H_
-#define	_LIMITS_H_
+#define _LIMITS_H_
 
 #include <sys/cdefs.h>
 
+/* Historically bionic exposed the content of <float.h> from <limits.h> and <sys/limits.h> too. */
+#include <float.h>
+
+#include <linux/limits.h>
+
 #define PASS_MAX		128	/* _PASSWORD_LEN from <pwd.h> */
 
 #define NL_ARGMAX		9
@@ -48,7 +53,48 @@
 
 #define TMP_MAX                 308915776
 
-#include <sys/limits.h>
+/* TODO: get all these from the compiler's <limits.h>? */
+
+#define CHAR_BIT 8
+#ifdef __LP64__
+# define LONG_BIT 64
+#else
+# define LONG_BIT 32
+#endif
+
+#define	SCHAR_MAX	0x7f		/* max value for a signed char */
+#define SCHAR_MIN	(-0x7f-1)	/* min value for a signed char */
+
+#define	UCHAR_MAX	0xffU		/* max value for an unsigned char */
+#ifdef __CHAR_UNSIGNED__
+# define CHAR_MIN	0		/* min value for a char */
+# define CHAR_MAX	0xff		/* max value for a char */
+#else
+# define CHAR_MAX	0x7f
+# define CHAR_MIN	(-0x7f-1)
+#endif
+
+#define	USHRT_MAX	0xffffU		/* max value for an unsigned short */
+#define	SHRT_MAX	0x7fff		/* max value for a short */
+#define SHRT_MIN        (-0x7fff-1)     /* min value for a short */
+
+#define	UINT_MAX	0xffffffffU	/* max value for an unsigned int */
+#define	INT_MAX		0x7fffffff	/* max value for an int */
+#define	INT_MIN		(-0x7fffffff-1)	/* min value for an int */
+
+#ifdef __LP64__
+# define ULONG_MAX	0xffffffffffffffffUL     /* max value for unsigned long */
+# define LONG_MAX	0x7fffffffffffffffL      /* max value for a signed long */
+# define LONG_MIN	(-0x7fffffffffffffffL-1) /* min value for a signed long */
+#else
+# define ULONG_MAX	0xffffffffUL	/* max value for an unsigned long */
+# define LONG_MAX	0x7fffffffL	/* max value for a long */
+# define LONG_MIN	(-0x7fffffffL-1)/* min value for a long */
+#endif
+
+# define ULLONG_MAX	0xffffffffffffffffULL     /* max value for unsigned long long */
+# define LLONG_MAX	0x7fffffffffffffffLL      /* max value for a signed long long */
+# define LLONG_MIN	(-0x7fffffffffffffffLL-1) /* min value for a signed long long */
 
 /* GLibc compatibility definitions.
    Note that these are defined by GCC's <limits.h>
@@ -67,6 +113,8 @@
 #endif
 
 #if defined(__USE_BSD) || defined(__BIONIC__) /* Historically bionic exposed these. */
+# define UID_MAX	UINT_MAX	/* max value for a uid_t */
+# define GID_MAX	UINT_MAX	/* max value for a gid_t */
 #if defined(__LP64__)
 #define SIZE_T_MAX ULONG_MAX
 #else
@@ -89,4 +137,16 @@
 #include <bits/posix_limits.h>
 
 #define HOST_NAME_MAX _POSIX_HOST_NAME_MAX
+
+#define  _POSIX_VERSION             200809L   /* Posix C language bindings version */
+#define  _POSIX2_VERSION            -1        /* we don't support Posix command-line tools */
+#define  _XOPEN_VERSION             700       /* by Posix definition */
+
+/* >= _POSIX_THREAD_DESTRUCTOR_ITERATIONS */
+#define PTHREAD_DESTRUCTOR_ITERATIONS 4
+/* >= _POSIX_THREAD_KEYS_MAX */
+#define PTHREAD_KEYS_MAX 128
+/* bionic has no specific limit */
+#undef PTHREAD_THREADS_MAX
+
 #endif /* !_LIMITS_H_ */
diff --git a/libc/include/sys/limits.h b/libc/include/sys/limits.h
index 60cc7f7..1e189a1 100644
--- a/libc/include/sys/limits.h
+++ b/libc/include/sys/limits.h
@@ -1,122 +1 @@
-/* $OpenBSD: limits.h,v 1.6 2005/12/13 00:35:23 millert Exp $ */
-/*
- * Copyright (c) 2002 Marc Espie.
- *
- * 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 OPENBSD PROJECT 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 OPENBSD
- * PROJECT 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.
- */
-#ifndef _SYS_LIMITS_H_
-#define _SYS_LIMITS_H_
-
-#include <sys/cdefs.h>
-#include <linux/limits.h>
-
-/* Common definitions for limits.h. */
-
-#define	CHAR_BIT	8		/* number of bits in a char */
-
-#define	SCHAR_MAX	0x7f		/* max value for a signed char */
-#define SCHAR_MIN	(-0x7f-1)	/* min value for a signed char */
-
-#define	UCHAR_MAX	0xffU		/* max value for an unsigned char */
-#ifdef __CHAR_UNSIGNED__
-# define CHAR_MIN	0		/* min value for a char */
-# define CHAR_MAX	0xff		/* max value for a char */
-#else
-# define CHAR_MAX	0x7f
-# define CHAR_MIN	(-0x7f-1)
-#endif
-
-#define	USHRT_MAX	0xffffU		/* max value for an unsigned short */
-#define	SHRT_MAX	0x7fff		/* max value for a short */
-#define SHRT_MIN        (-0x7fff-1)     /* min value for a short */
-
-#define	UINT_MAX	0xffffffffU	/* max value for an unsigned int */
-#define	INT_MAX		0x7fffffff	/* max value for an int */
-#define	INT_MIN		(-0x7fffffff-1)	/* min value for an int */
-
-#ifdef __LP64__
-# define ULONG_MAX	0xffffffffffffffffUL
-					/* max value for unsigned long */
-# define LONG_MAX	0x7fffffffffffffffL
-					/* max value for a signed long */
-# define LONG_MIN	(-0x7fffffffffffffffL-1)
-					/* min value for a signed long */
-#else
-# define ULONG_MAX	0xffffffffUL	/* max value for an unsigned long */
-# define LONG_MAX	0x7fffffffL	/* max value for a long */
-# define LONG_MIN	(-0x7fffffffL-1)/* min value for a long */
-#endif
-
-# define ULLONG_MAX	0xffffffffffffffffULL
-					/* max value for unsigned long long */
-# define LLONG_MAX	0x7fffffffffffffffLL
-					/* max value for a signed long long */
-# define LLONG_MIN	(-0x7fffffffffffffffLL-1)
-					/* min value for a signed long long */
-
-#if defined(__USE_BSD) || defined(__BIONIC__) /* Historically bionic exposed these. */
-# define UID_MAX	UINT_MAX	/* max value for a uid_t */
-# define GID_MAX	UINT_MAX	/* max value for a gid_t */
-#endif
-
-
-#ifdef __LP64__
-# define LONG_BIT	64
-#else
-# define LONG_BIT	32
-#endif
-
-/* float.h defines these as well */
-# if !defined(DBL_DIG)
-#  if defined(__DBL_DIG)
-#   define DBL_DIG	__DBL_DIG
-#   define DBL_MAX	__DBL_MAX
-#   define DBL_MIN	__DBL_MIN
-
-#   define FLT_DIG	__FLT_DIG
-#   define FLT_MAX	__FLT_MAX
-#   define FLT_MIN	__FLT_MIN
-#  else
-#   define DBL_DIG	15
-#   define DBL_MAX	1.7976931348623157E+308
-#   define DBL_MIN	2.2250738585072014E-308
-
-#   define FLT_DIG	6
-#   define FLT_MAX	3.40282347E+38F
-#   define FLT_MIN	1.17549435E-38F
-#  endif
-# endif
-
-/* Bionic-specific definitions */
-
-#define  _POSIX_VERSION             200809L   /* Posix C language bindings version */
-#define  _POSIX2_VERSION            -1        /* we don't support Posix command-line tools */
-#define  _XOPEN_VERSION             700       /* by Posix definition */
-
-/* >= _POSIX_THREAD_DESTRUCTOR_ITERATIONS */
-#define PTHREAD_DESTRUCTOR_ITERATIONS 4
-/* >= _POSIX_THREAD_KEYS_MAX */
-#define PTHREAD_KEYS_MAX 128
-/* bionic has no specific limit */
-#undef PTHREAD_THREADS_MAX
-
-#endif
+#include <limits.h>