For GHC, implement the Typeable.hs macros using standalone deriving

[ghc-base.git] / Data / Dynamic.hs

diff --git a/Data/Dynamic.hs b/Data/Dynamic.hs
index b83bbfa..df64c38 100644 (file)
--- a/Data/Dynamic.hs
+++ b/Data/Dynamic.hs
@@ -1,4 +1,7 @@
 {-# LANGUAGE CPP, NoImplicitPrelude #-}
+#ifdef __GLASGOW_HASKELL__
+{-# LANGUAGE DeriveDataTypeable, StandaloneDeriving #-}
+#endif
 
 -----------------------------------------------------------------------------
 -- |