Expose nl_langinfo through locale where available.
diff --git a/configure.in b/configure.in
index b4f72a5..07e9f09 100644
--- a/configure.in
+++ b/configure.in
@@ -413,7 +413,8 @@
# checks for header files
AC_HEADER_STDC
-AC_CHECK_HEADERS(dlfcn.h fcntl.h limits.h locale.h ncurses.h poll.h pthread.h \
+AC_CHECK_HEADERS(dlfcn.h fcntl.h limits.h langinfo.h locale.h \
+ncurses.h poll.h pthread.h \
signal.h stdarg.h stddef.h stdlib.h thread.h unistd.h utime.h termios.h \
sys/audioio.h sys/file.h sys/lock.h sys/modem.h db_185.h db.h \
sys/param.h sys/poll.h sys/select.h sys/socket.h sys/time.h sys/times.h \