diff --git a/Misc/NEWS.d/next/Build/2017-11-21-17-27-59.bpo-28538.DsNBS7.rst b/Misc/NEWS.d/next/Build/2017-11-21-17-27-59.bpo-28538.DsNBS7.rst
new file mode 100644
index 00000000000..db435b008f7
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2017-11-21-17-27-59.bpo-28538.DsNBS7.rst
@@ -0,0 +1,2 @@
+Revert the previous changes, the if_nameindex structure is defined by
+Unified Headers.
diff --git a/configure b/configure
index 5e0522476e7..ab33115d563 100755
--- a/configure
+++ b/configure
@@ -778,7 +778,6 @@ infodir
 docdir
 oldincludedir
 includedir
-runstatedir
 localstatedir
 sharedstatedir
 sysconfdir
@@ -890,7 +889,6 @@ datadir='${datarootdir}'
 sysconfdir='${prefix}/etc'
 sharedstatedir='${prefix}/com'
 localstatedir='${prefix}/var'
-runstatedir='${localstatedir}/run'
 includedir='${prefix}/include'
 oldincludedir='/usr/include'
 docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
@@ -1143,15 +1141,6 @@ do
   | -silent | --silent | --silen | --sile | --sil)
     silent=yes ;;
 
-  -runstatedir | --runstatedir | --runstatedi | --runstated \
-  | --runstate | --runstat | --runsta | --runst | --runs \
-  | --run | --ru | --r)
-    ac_prev=runstatedir ;;
-  -runstatedir=* | --runstatedir=* | --runstatedi=* | --runstated=* \
-  | --runstate=* | --runstat=* | --runsta=* | --runst=* | --runs=* \
-  | --run=* | --ru=* | --r=*)
-    runstatedir=$ac_optarg ;;
-
   -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
     ac_prev=sbindir ;;
   -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
@@ -1289,7 +1278,7 @@ fi
 for ac_var in	exec_prefix prefix bindir sbindir libexecdir datarootdir \
 		datadir sysconfdir sharedstatedir localstatedir includedir \
 		oldincludedir docdir infodir htmldir dvidir pdfdir psdir \
-		libdir localedir mandir runstatedir
+		libdir localedir mandir
 do
   eval ac_val=\$$ac_var
   # Remove trailing slashes.
@@ -1442,7 +1431,6 @@ Fine tuning of the installation directories:
   --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
   --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
   --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
-  --runstatedir=DIR       modifiable per-process data [LOCALSTATEDIR/run]
   --libdir=DIR            object code libraries [EPREFIX/lib]
   --includedir=DIR        C header files [PREFIX/include]
   --oldincludedir=DIR     C header files for non-gcc [/usr/include]
@@ -11155,6 +11143,7 @@ for ac_func in alarm accept4 setitimer getitimer bind_textdomain_codeset chown \
  futimens futimes gai_strerror getentropy \
  getgrouplist getgroups getlogin getloadavg getpeername getpgid getpid \
  getpriority getresuid getresgid getpwent getspnam getspent getsid getwd \
+ if_nameindex \
  initgroups kill killpg lchmod lchown linkat lstat lutimes mmap \
  memrchr mbrtowc mkdirat mkfifo \
  mkfifoat mknod mknodat mktime mremap nice openat pathconf pause pipe2 plock poll \
@@ -12585,51 +12574,6 @@ else
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 
-fi
-rm -f core conftest.err conftest.$ac_objext \
-    conftest$ac_exeext conftest.$ac_ext
-
-# On Android API level 24 with android-ndk-r13, if_nameindex() is available,
-# but the if_nameindex structure is not defined.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for if_nameindex" >&5
-$as_echo_n "checking for if_nameindex... " >&6; }
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-#include <stdio.h>
-#ifdef STDC_HEADERS
-# include <stdlib.h>
-# include <stddef.h>
-#else
-# ifdef HAVE_STDLIB_H
-#  include <stdlib.h>
-# endif
-#endif
-#ifdef HAVE_SYS_SOCKET_H
-# include <sys/socket.h>
-#endif
-#ifdef HAVE_NET_IF_H
-# include <net/if.h>
-#endif
-
-int
-main ()
-{
-struct if_nameindex *ni = if_nameindex(); int x = ni[0].if_index;
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
-
-$as_echo "#define HAVE_IF_NAMEINDEX 1" >>confdefs.h
-
-   { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-
 fi
 rm -f core conftest.err conftest.$ac_objext \
     conftest$ac_exeext conftest.$ac_ext
diff --git a/configure.ac b/configure.ac
index 3464212eddc..501f07892f8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3411,6 +3411,7 @@ AC_CHECK_FUNCS(alarm accept4 setitimer getitimer bind_textdomain_codeset chown \
  futimens futimes gai_strerror getentropy \
  getgrouplist getgroups getlogin getloadavg getpeername getpgid getpid \
  getpriority getresuid getresgid getpwent getspnam getspent getsid getwd \
+ if_nameindex \
  initgroups kill killpg lchmod lchown linkat lstat lutimes mmap \
  memrchr mbrtowc mkdirat mkfifo \
  mkfifoat mknod mknodat mktime mremap nice openat pathconf pause pipe2 plock poll \
@@ -3760,31 +3761,6 @@ AC_LINK_IFELSE([AC_LANG_PROGRAM([[
   AC_MSG_RESULT(no)
 ])
 
-# On Android API level 24 with android-ndk-r13, if_nameindex() is available,
-# but the if_nameindex structure is not defined.
-AC_MSG_CHECKING(for if_nameindex)
-AC_LINK_IFELSE([AC_LANG_PROGRAM([[
-#include <stdio.h>
-#ifdef STDC_HEADERS
-# include <stdlib.h>
-# include <stddef.h>
-#else
-# ifdef HAVE_STDLIB_H
-#  include <stdlib.h>
-# endif
-#endif
-#ifdef HAVE_SYS_SOCKET_H
-# include <sys/socket.h>
-#endif
-#ifdef HAVE_NET_IF_H
-# include <net/if.h>
-#endif
-]], [[struct if_nameindex *ni = if_nameindex(); int x = ni[0].if_index;]])],
-  [AC_DEFINE(HAVE_IF_NAMEINDEX, 1, Define to 1 if you have the 'if_nameindex' function.)
-   AC_MSG_RESULT(yes)],
-  [AC_MSG_RESULT(no)
-])
-
 # Issue #28762: lockf() is available on Android API level 24, but the F_LOCK
 # macro is not defined in android-ndk-r13.
 AC_MSG_CHECKING(for lockf)