diff --git a/libc/include/android/crash_detail.h b/libc/include/android/crash_detail.h
index 946a3ab..490ec8c 100644
--- a/libc/include/android/crash_detail.h
+++ b/libc/include/android/crash_detail.h
@@ -33,9 +33,10 @@
  * @brief Attach extra information to android crashes.
  */
 
-#include <stddef.h>
 #include <sys/cdefs.h>
 
+#include <stddef.h>
+
 __BEGIN_DECLS
 
 typedef struct crash_detail_t crash_detail_t;
diff --git a/libc/include/android/dlext.h b/libc/include/android/dlext.h
index 842ceea..d8d2752 100644
--- a/libc/include/android/dlext.h
+++ b/libc/include/android/dlext.h
@@ -16,10 +16,11 @@
 
 #pragma once
 
+#include <sys/cdefs.h>
+
 #include <stdbool.h>
 #include <stddef.h>
 #include <stdint.h>
-#include <sys/cdefs.h>
 #include <sys/types.h>  /* for off64_t */
 
 /**
diff --git a/libc/include/android/fdsan.h b/libc/include/android/fdsan.h
index 4540498..fd0a63f 100644
--- a/libc/include/android/fdsan.h
+++ b/libc/include/android/fdsan.h
@@ -28,9 +28,10 @@
 
 #pragma once
 
+#include <sys/cdefs.h>
+
 #include <stdbool.h>
 #include <stdint.h>
-#include <sys/cdefs.h>
 
 __BEGIN_DECLS
 
diff --git a/libc/include/android/set_abort_message.h b/libc/include/android/set_abort_message.h
index a778057..6ad5678 100644
--- a/libc/include/android/set_abort_message.h
+++ b/libc/include/android/set_abort_message.h
@@ -33,10 +33,11 @@
  * @brief The android_set_abort_message() function.
  */
 
+#include <sys/cdefs.h>
+
 #include <stddef.h>
 #include <stdint.h>
 #include <string.h>
-#include <sys/cdefs.h>
 
 __BEGIN_DECLS
 
diff --git a/libc/include/arpa/ftp.h b/libc/include/arpa/ftp.h
index 081c037..fecbf7f 100644
--- a/libc/include/arpa/ftp.h
+++ b/libc/include/arpa/ftp.h
@@ -34,6 +34,8 @@
 #ifndef _ARPA_FTP_H_
 #define	_ARPA_FTP_H_
 
+#include <sys/cdefs.h>
+
 /* Definitions for FTP; see RFC-765. */
 
 /*
diff --git a/libc/include/arpa/inet.h b/libc/include/arpa/inet.h
index f00f2c1..ce9dd93 100644
--- a/libc/include/arpa/inet.h
+++ b/libc/include/arpa/inet.h
@@ -29,9 +29,10 @@
 #ifndef _ARPA_INET_H_
 #define _ARPA_INET_H_
 
+#include <sys/cdefs.h>
+
 #include <netinet/in.h>
 #include <stdint.h>
-#include <sys/cdefs.h>
 #include <sys/types.h>
 
 __BEGIN_DECLS
diff --git a/libc/include/arpa/nameser.h b/libc/include/arpa/nameser.h
index 97109ee..7f8b9ba 100644
--- a/libc/include/arpa/nameser.h
+++ b/libc/include/arpa/nameser.h
@@ -55,9 +55,10 @@
 
 #define BIND_4_COMPAT
 
-#include <sys/types.h>
 #include <sys/cdefs.h>
 
+#include <sys/types.h>
+
 /*
  * Revision information.  This is the release date in YYYYMMDD format.
  * It can change every day so the right thing to do with it is use it
diff --git a/libc/include/arpa/nameser_compat.h b/libc/include/arpa/nameser_compat.h
index e4e9335..027e5ca 100644
--- a/libc/include/arpa/nameser_compat.h
+++ b/libc/include/arpa/nameser_compat.h
@@ -40,9 +40,10 @@
 #ifndef _ARPA_NAMESER_COMPAT_
 #define	_ARPA_NAMESER_COMPAT_
 
-#include <endian.h>
 #include <sys/cdefs.h>
 
+#include <endian.h>
+
 #define	__BIND		19950621	/* (DEAD) interface version stamp. */
 
 /*
diff --git a/libc/include/arpa/telnet.h b/libc/include/arpa/telnet.h
index 758e9b8..30d8f21 100644
--- a/libc/include/arpa/telnet.h
+++ b/libc/include/arpa/telnet.h
@@ -33,6 +33,8 @@
 #ifndef _ARPA_TELNET_H_
 #define	_ARPA_TELNET_H_
 
+#include <sys/cdefs.h>
+
 /*
  * Definitions for the TELNET protocol.
  */
diff --git a/libc/include/bits/bionic_multibyte_result.h b/libc/include/bits/bionic_multibyte_result.h
index 0d5cf21..930e67c 100644
--- a/libc/include/bits/bionic_multibyte_result.h
+++ b/libc/include/bits/bionic_multibyte_result.h
@@ -34,9 +34,10 @@
  * conversion APIs defined by C.
  */
 
-#include <stddef.h>
 #include <sys/cdefs.h>
 
+#include <stddef.h>
+
 __BEGIN_DECLS
 
 /**
diff --git a/libc/include/bits/seek_constants.h b/libc/include/bits/seek_constants.h
index bfc02a8..a4fffb2 100644
--- a/libc/include/bits/seek_constants.h
+++ b/libc/include/bits/seek_constants.h
@@ -33,6 +33,8 @@
  * @brief The `SEEK_` constants.
  */
 
+#include <sys/cdefs.h>
+
 /** Seek to an absolute offset. */
 #define SEEK_SET 0
 /** Seek relative to the current offset. */
diff --git a/libc/include/bits/swab.h b/libc/include/bits/swab.h
index 9591c2e..da2865a 100644
--- a/libc/include/bits/swab.h
+++ b/libc/include/bits/swab.h
@@ -28,8 +28,9 @@
 
 #pragma once
 
-#include <stdint.h>
 #include <sys/cdefs.h>
+
+#include <stdint.h>
 #include <sys/types.h>
 
 #if !defined(__BIONIC_SWAB_INLINE)
diff --git a/libc/include/bits/termios_inlines.h b/libc/include/bits/termios_inlines.h
index a884b59..bb04e4d 100644
--- a/libc/include/bits/termios_inlines.h
+++ b/libc/include/bits/termios_inlines.h
@@ -29,8 +29,9 @@
 #ifndef _BITS_TERMIOS_INLINES_H_
 #define _BITS_TERMIOS_INLINES_H_
 
-#include <errno.h>
 #include <sys/cdefs.h>
+
+#include <errno.h>
 #include <sys/ioctl.h>
 #include <sys/types.h>
 
diff --git a/libc/include/bits/termios_winsize_inlines.h b/libc/include/bits/termios_winsize_inlines.h
index ae246e4..86777b0 100644
--- a/libc/include/bits/termios_winsize_inlines.h
+++ b/libc/include/bits/termios_winsize_inlines.h
@@ -28,8 +28,9 @@
 
 #pragma once
 
-#include <errno.h>
 #include <sys/cdefs.h>
+
+#include <errno.h>
 #include <sys/ioctl.h>
 #include <sys/types.h>
 
diff --git a/libc/include/bits/threads_inlines.h b/libc/include/bits/threads_inlines.h
index 05b785a..ab294c1 100644
--- a/libc/include/bits/threads_inlines.h
+++ b/libc/include/bits/threads_inlines.h
@@ -28,6 +28,8 @@
 
 #pragma once
 
+#include <sys/cdefs.h>
+
 #include <threads.h>
 
 #include <errno.h>
diff --git a/libc/include/dirent.h b/libc/include/dirent.h
index 5333d78..2695305 100644
--- a/libc/include/dirent.h
+++ b/libc/include/dirent.h
@@ -33,8 +33,9 @@
  * @brief Directory entry iteration.
  */
 
-#include <stdint.h>
 #include <sys/cdefs.h>
+
+#include <stdint.h>
 #include <sys/types.h>
 
 __BEGIN_DECLS
diff --git a/libc/include/dlfcn.h b/libc/include/dlfcn.h
index 071d50a..1b0d11b 100644
--- a/libc/include/dlfcn.h
+++ b/libc/include/dlfcn.h
@@ -28,9 +28,10 @@
 
 #pragma once
 
-#include <stdint.h>
 #include <sys/cdefs.h>
 
+#include <stdint.h>
+
 __BEGIN_DECLS
 
 /**
diff --git a/libc/include/err.h b/libc/include/err.h
index d8122d7..4a1841b 100644
--- a/libc/include/err.h
+++ b/libc/include/err.h
@@ -36,8 +36,9 @@
  * @brief BSD error reporting functions. See `<error.h>` for the GNU equivalent.
  */
 
-#include <stdarg.h>
 #include <sys/cdefs.h>
+
+#include <stdarg.h>
 #include <sys/types.h>
 
 __BEGIN_DECLS
diff --git a/libc/include/inttypes.h b/libc/include/inttypes.h
index 9fcd9f3..790030e 100644
--- a/libc/include/inttypes.h
+++ b/libc/include/inttypes.h
@@ -19,8 +19,8 @@
 #ifndef	_INTTYPES_H_
 #define	_INTTYPES_H_
 
-#include <stdint.h>
 #include <sys/cdefs.h>
+#include <stdint.h>
 
 #ifdef __LP64__
 #define __PRI_64_prefix  "l"
diff --git a/libc/include/link.h b/libc/include/link.h
index 216502e..331070e 100644
--- a/libc/include/link.h
+++ b/libc/include/link.h
@@ -33,8 +33,9 @@
  * @brief Extra dynamic linker functionality (see also <dlfcn.h>).
  */
 
-#include <stdint.h>
 #include <sys/cdefs.h>
+
+#include <stdint.h>
 #include <sys/types.h>
 
 #include <elf.h>
diff --git a/libc/include/mntent.h b/libc/include/mntent.h
index 9a31838..b4d1233 100644
--- a/libc/include/mntent.h
+++ b/libc/include/mntent.h
@@ -29,8 +29,9 @@
 #ifndef _MNTENT_H_
 #define _MNTENT_H_
 
-#include <stdio.h>
 #include <sys/cdefs.h>
+
+#include <stdio.h>
 #include <paths.h>  /* for _PATH_MOUNTED */
 
 #define MOUNTED _PATH_MOUNTED
diff --git a/libc/include/net/if.h b/libc/include/net/if.h
index 79b4195..4bbdb21 100644
--- a/libc/include/net/if.h
+++ b/libc/include/net/if.h
@@ -29,9 +29,10 @@
 #ifndef _NET_IF_H_
 #define _NET_IF_H_
 
+#include <sys/cdefs.h>
+
 #include <sys/socket.h>
 #include <linux/if.h>
-#include <sys/cdefs.h>
 
 #ifndef IF_NAMESIZE
 #define IF_NAMESIZE IFNAMSIZ
diff --git a/libc/include/netinet/icmp6.h b/libc/include/netinet/icmp6.h
index 2b237a8..ebd9f6c 100644
--- a/libc/include/netinet/icmp6.h
+++ b/libc/include/netinet/icmp6.h
@@ -65,9 +65,10 @@
 #ifndef _NETINET_ICMP6_H_
 #define _NETINET_ICMP6_H_
 
-#include <netinet/in.h> /* android-added: glibc source compatibility. */
 #include <sys/cdefs.h>
 
+#include <netinet/in.h> /* android-added: glibc source compatibility. */
+
 #define ICMPV6_PLD_MAXLEN	1232	/* IPV6_MMTU - sizeof(struct ip6_hdr)
 					   - sizeof(struct icmp6_hdr) */
 
diff --git a/libc/include/netinet/in.h b/libc/include/netinet/in.h
index 163e614..d4ce302 100644
--- a/libc/include/netinet/in.h
+++ b/libc/include/netinet/in.h
@@ -28,9 +28,10 @@
 
 #pragma once
 
+#include <sys/cdefs.h>
+
 #include <endian.h>
 #include <netinet/in6.h>
-#include <sys/cdefs.h>
 #include <sys/socket.h>
 
 #include <linux/in.h>
diff --git a/libc/include/pthread.h b/libc/include/pthread.h
index d718b40..2fa10bb 100644
--- a/libc/include/pthread.h
+++ b/libc/include/pthread.h
@@ -33,11 +33,12 @@
  * @brief POSIX threads.
  */
 
+#include <sys/cdefs.h>
+
 #include <limits.h>
 #include <bits/page_size.h>
 #include <bits/pthread_types.h>
 #include <sched.h>
-#include <sys/cdefs.h>
 #include <sys/types.h>
 #include <time.h>
 
diff --git a/libc/include/resolv.h b/libc/include/resolv.h
index f25484a..4367359 100644
--- a/libc/include/resolv.h
+++ b/libc/include/resolv.h
@@ -29,9 +29,10 @@
 #ifndef _RESOLV_H_
 #define _RESOLV_H_
 
+#include <sys/cdefs.h>
+
 #include <sys/param.h>
 #include <sys/types.h>
-#include <sys/cdefs.h>
 #include <sys/socket.h>
 #include <stdio.h>
 #include <arpa/nameser.h>
diff --git a/libc/include/sched.h b/libc/include/sched.h
index e8f7736..7a2dcad 100644
--- a/libc/include/sched.h
+++ b/libc/include/sched.h
@@ -33,9 +33,10 @@
  * @brief Thread execution scheduling.
  */
 
+#include <sys/cdefs.h>
+
 #include <bits/timespec.h>
 #include <linux/sched.h>
-#include <sys/cdefs.h>
 
 __BEGIN_DECLS
 
diff --git a/libc/include/stdint.h b/libc/include/stdint.h
index 322a81c..772fe8b 100644
--- a/libc/include/stdint.h
+++ b/libc/include/stdint.h
@@ -29,9 +29,10 @@
 #ifndef _STDINT_H
 #define _STDINT_H
 
+#include <sys/cdefs.h>
+
 #include <bits/wchar_limits.h>
 #include <stddef.h>
-#include <sys/cdefs.h>
 
 typedef signed char __int8_t;
 typedef unsigned char __uint8_t;
diff --git a/libc/include/stdlib.h b/libc/include/stdlib.h
index 076a978..2c918d4 100644
--- a/libc/include/stdlib.h
+++ b/libc/include/stdlib.h
@@ -29,11 +29,12 @@
 #ifndef _STDLIB_H
 #define _STDLIB_H
 
+#include <sys/cdefs.h>
+
 #include <alloca.h>
 #include <bits/wait.h>
 #include <malloc.h>
 #include <stddef.h>
-#include <sys/cdefs.h>
 #include <xlocale.h>
 
 __BEGIN_DECLS
diff --git a/libc/include/strings.h b/libc/include/strings.h
index d203bd2..7543edc 100644
--- a/libc/include/strings.h
+++ b/libc/include/strings.h
@@ -43,8 +43,9 @@
  * @brief Extra string functions.
  */
 
-#include <sys/types.h>
 #include <sys/cdefs.h>
+
+#include <sys/types.h>
 #include <xlocale.h>
 
 #include <bits/strcasecmp.h>
diff --git a/libc/include/sys/param.h b/libc/include/sys/param.h
index 1c991ae..99b6a07 100644
--- a/libc/include/sys/param.h
+++ b/libc/include/sys/param.h
@@ -33,10 +33,11 @@
  * @brief Various macros.
  */
 
+#include <sys/cdefs.h>
+
 #include <endian.h>
 #include <limits.h>
 #include <linux/param.h>
-#include <sys/cdefs.h>
 
 /** The unit of `st_blocks` in `struct stat`. */
 #define DEV_BSIZE 512
diff --git a/libc/include/sys/stat.h b/libc/include/sys/stat.h
index 2633b69..ed52bcc 100644
--- a/libc/include/sys/stat.h
+++ b/libc/include/sys/stat.h
@@ -33,9 +33,10 @@
  * @brief File status.
  */
 
+#include <sys/cdefs.h>
+
 #include <bits/timespec.h>
 #include <linux/stat.h>
-#include <sys/cdefs.h>
 #include <sys/types.h>
 
 __BEGIN_DECLS
diff --git a/libc/include/sys/statvfs.h b/libc/include/sys/statvfs.h
index 2feca81..860824b 100644
--- a/libc/include/sys/statvfs.h
+++ b/libc/include/sys/statvfs.h
@@ -21,8 +21,9 @@
  * @brief Filesystem statistics.
  */
 
-#include <stdint.h>
 #include <sys/cdefs.h>
+
+#include <stdint.h>
 #include <sys/types.h>
 
 __BEGIN_DECLS
diff --git a/libc/include/sys/syscall.h b/libc/include/sys/syscall.h
index a49323d..9341ffb 100644
--- a/libc/include/sys/syscall.h
+++ b/libc/include/sys/syscall.h
@@ -29,9 +29,10 @@
 #ifndef _SYS_SYSCALL_H_
 #define _SYS_SYSCALL_H_
 
+#include <sys/cdefs.h>
+
 #include <asm/unistd.h> /* Linux kernel __NR_* names. */
 #include <bits/glibc-syscalls.h> /* glibc-compatible SYS_* aliases. */
-#include <sys/cdefs.h>
 
 /* The syscall function itself is declared in <unistd.h>, not here. */
 
diff --git a/libc/include/sys/timerfd.h b/libc/include/sys/timerfd.h
index bfa9a55..f7f1ffa 100644
--- a/libc/include/sys/timerfd.h
+++ b/libc/include/sys/timerfd.h
@@ -33,10 +33,11 @@
  * @brief Timer file descriptors.
  */
 
+#include <sys/cdefs.h>
+
 #include <fcntl.h>
 #include <linux/timerfd.h>
 #include <time.h>
-#include <sys/cdefs.h>
 #include <sys/types.h>
 
 __BEGIN_DECLS
diff --git a/libc/include/sys/types.h b/libc/include/sys/types.h
index 4622a4e..0446260 100644
--- a/libc/include/sys/types.h
+++ b/libc/include/sys/types.h
@@ -29,9 +29,10 @@
 #ifndef _SYS_TYPES_H_
 #define _SYS_TYPES_H_
 
+#include <sys/cdefs.h>
+
 #include <stddef.h>
 #include <stdint.h>
-#include <sys/cdefs.h>
 
 #include <linux/types.h>
 #include <linux/posix_types.h>
diff --git a/libc/include/sys/un.h b/libc/include/sys/un.h
index 83c1d17..c2bfcb0 100644
--- a/libc/include/sys/un.h
+++ b/libc/include/sys/un.h
@@ -33,9 +33,10 @@
  * @brief Unix domain sockets.
  */
 
+#include <sys/cdefs.h>
+
 #include <bits/sa_family_t.h>
 #include <linux/un.h>
-#include <sys/cdefs.h>
 
 #if defined(__USE_BSD) || defined(__USE_GNU)
 #include <string.h>
diff --git a/libc/include/sys/vfs.h b/libc/include/sys/vfs.h
index 1a640ba..5d078be 100644
--- a/libc/include/sys/vfs.h
+++ b/libc/include/sys/vfs.h
@@ -29,8 +29,9 @@
 #ifndef _SYS_VFS_H_
 #define _SYS_VFS_H_
 
-#include <stdint.h>
 #include <sys/cdefs.h>
+
+#include <stdint.h>
 #include <sys/types.h>
 
 __BEGIN_DECLS
diff --git a/libc/include/sys/wait.h b/libc/include/sys/wait.h
index 5208366..632aa43 100644
--- a/libc/include/sys/wait.h
+++ b/libc/include/sys/wait.h
@@ -28,8 +28,9 @@
 
 #pragma once
 
-#include <bits/wait.h>
 #include <sys/cdefs.h>
+
+#include <bits/wait.h>
 #include <sys/types.h>
 #include <sys/resource.h>
 #include <linux/wait.h>
diff --git a/libc/include/sys/xattr.h b/libc/include/sys/xattr.h
index 38c11e2..ebe4eb8 100644
--- a/libc/include/sys/xattr.h
+++ b/libc/include/sys/xattr.h
@@ -33,8 +33,9 @@
  * @brief Extended attribute functions.
  */
 
-#include <linux/xattr.h>
 #include <sys/cdefs.h>
+
+#include <linux/xattr.h>
 #include <sys/types.h>
 
 __BEGIN_DECLS
diff --git a/libc/include/syslog.h b/libc/include/syslog.h
index 33979f0..7a594f1 100644
--- a/libc/include/syslog.h
+++ b/libc/include/syslog.h
@@ -56,8 +56,9 @@
 
 #pragma once
 
-#include <stdio.h>
 #include <sys/cdefs.h>
+
+#include <stdio.h>
 #include <stdarg.h>
 
 __BEGIN_DECLS
diff --git a/libc/include/uchar.h b/libc/include/uchar.h
index 55a36e7..94efb2d 100644
--- a/libc/include/uchar.h
+++ b/libc/include/uchar.h
@@ -33,9 +33,10 @@
  * @brief Unicode functions.
  */
 
-#include <stddef.h>
 #include <sys/cdefs.h>
 
+#include <stddef.h>
+
 #include <bits/bionic_multibyte_result.h>
 #include <bits/mbstate_t.h>
 
diff --git a/libc/include/unistd.h b/libc/include/unistd.h
index 9bc01f0..f11990d 100644
--- a/libc/include/unistd.h
+++ b/libc/include/unistd.h
@@ -28,8 +28,9 @@
 
 #pragma once
 
-#include <stddef.h>
 #include <sys/cdefs.h>
+
+#include <stddef.h>
 #include <sys/types.h>
 #include <sys/select.h>
 
diff --git a/libc/include/wctype.h b/libc/include/wctype.h
index 4f6f81f..2b7f972 100644
--- a/libc/include/wctype.h
+++ b/libc/include/wctype.h
@@ -29,8 +29,9 @@
 #ifndef _WCTYPE_H_
 #define _WCTYPE_H_
 
-#include <bits/wctype.h>
 #include <sys/cdefs.h>
+
+#include <bits/wctype.h>
 #include <xlocale.h>
 
 __BEGIN_DECLS