diff -r 8c483030c5e7 Modules/_io/fileio.c
--- a/Modules/_io/fileio.c	Mon Nov 21 10:16:25 2016 -0800
+++ b/Modules/_io/fileio.c	Tue Nov 22 04:18:44 2016 +0900
@@ -9,6 +9,9 @@
 #ifdef HAVE_SYS_STAT_H
 #include <sys/stat.h>
 #endif
+#ifdef HAVE_IO_H
+#include <io.h>
+#endif
 #ifdef HAVE_FCNTL_H
 #include <fcntl.h>
 #endif
diff -r 8c483030c5e7 Modules/main.c
--- a/Modules/main.c	Mon Nov 21 10:16:25 2016 -0800
+++ b/Modules/main.c	Tue Nov 22 04:18:44 2016 +0900
@@ -7,6 +7,9 @@
 
 #if defined(MS_WINDOWS) || defined(__CYGWIN__)
 #include <windows.h>
+#ifdef HAVE_IO_H
+#include <io.h>
+#endif
 #ifdef HAVE_FCNTL_H
 #include <fcntl.h>
 #endif