X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=Data%2FEither.hs;fp=Data%2FEither.hs;h=b45609b005a140e1b404fbd054dd580b11110890;hb=4475dcabbc206d1cf0fc3fee88f600a4791d948c;hp=1c12897eaad3230d83b9111be1e0d4a3d6b82f9e;hpb=7b7fc46fd296030068c6682b37c028656fdf4a55;p=ghc-base.git

diff --git a/Data/Either.hs b/Data/Either.hs
index 1c12897..b45609b 100644
--- a/Data/Either.hs
+++ b/Data/Either.hs
@@ -1,4 +1,7 @@
 {-# LANGUAGE CPP, NoImplicitPrelude #-}
+#ifdef __GLASGOW_HASKELL__
+{-# LANGUAGE DeriveDataTypeable, StandaloneDeriving #-}
+#endif
 
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