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diff --git a/Utility/PosixFiles.hs b/Utility/PosixFiles.hs
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+{- POSIX files (and compatablity wrappers).
+ -
+ - This is like System.PosixCompat.Files, except with a fixed rename.
+ -
+ - Copyright 2014 Joey Hess <joey@kitenet.net>
+ -
+ - Licensed under the GNU GPL version 3 or higher.
+ -}
+
+{-# LANGUAGE CPP #-}
+
+module Utility.PosixFiles (
+	module X,
+	rename
+) where
+
+import System.PosixCompat.Files as X hiding (rename)
+
+#ifndef mingw32_HOST_OS
+import System.Posix.Files (rename)
+#else
+import qualified System.Win32.File as Win32
+#endif
+
+{- System.PosixCompat.Files.rename on Windows calls renameFile,
+ - so cannot rename directories. 
+ -
+ - Instead, use Win32 moveFile, which can. It needs to be told to overwrite
+ - any existing file. -}
+#ifdef mingw32_HOST_OS
+rename :: FilePath -> FilePath -> IO ()
+rename src dest = Win32.moveFileEx src dest Win32.mOVEFILE_REPLACE_EXISTING
+#endif