diff --git a/Utility/Gpg.hs b/Utility/Gpg.hs
index 0fbc6a8f91..5b6098a4be 100644
--- a/Utility/Gpg.hs
+++ b/Utility/Gpg.hs
@@ -182,7 +182,7 @@ feedRead cmd params passphrase feeder reader = do
 	withTmpFile (toOsPath "gpg") $ \tmpfile h -> do
 		liftIO $ B.hPutStr h passphrase
 		liftIO $ hClose h
-		let passphrasefile = [Param "--passphrase-file", File (fromOsPath tmpfile)]
+		let passphrasefile = [Param "--passphrase-file", File (fromRawFilePath (fromOsPath tmpfile))]
 		go $ passphrasefile ++ params
 #endif
   where