diff --git a/ChangeLog b/ChangeLog
index 6d2de5c56..4e7e4d982 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2013-10-15  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* grub-core/osdep/windows/hostdisk.c (fsync) [__MINGW32__]: Really
+	implement fsync.
+
 2013-10-15  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	* configure.ac: Check for nvlist_lookup_string in nvpair since we
diff --git a/grub-core/osdep/windows/hostdisk.c b/grub-core/osdep/windows/hostdisk.c
index f0318faf8..539ff7a15 100644
--- a/grub-core/osdep/windows/hostdisk.c
+++ b/grub-core/osdep/windows/hostdisk.c
@@ -422,8 +422,11 @@ grub_util_fopen (const char *path, const char *mode)
   return ret;
 }
 
-int fsync (int fno __attribute__ ((unused)))
+int fsync (int fno)
 {
+  HANDLE hnd;
+  hnd = _get_osfhandle (fno);
+  FlushFileBuffers (hnd);
   return 0;
 }