diff --git a/ChangeLog b/ChangeLog
index fea49343c5..7fc3a72304 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Mar  3 04:37:50 2014  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* io.c (rb_io_fsync): need to fsync even if on Windows.  fixed mistake
+	  of r45254 and r45256.
+
 Mon Mar  3 04:21:34 2014  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* test/win32ole: get rid of warnings (unused variable).
diff --git a/io.c b/io.c
index 8d78d17e05..5200ea9218 100644
--- a/io.c
+++ b/io.c
@@ -1925,10 +1925,8 @@ rb_io_fsync(VALUE io)
 
     if (io_fflush(fptr) < 0)
         rb_sys_fail(0);
-# ifndef _WIN32
     if ((int)rb_thread_io_blocking_region(nogvl_fsync, fptr, fptr->fd) < 0)
 	rb_sys_fail_path(fptr->pathv);
-# endif
     return INT2FIX(0);
 }
 #else