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

[ghc-base.git] / Foreign / Ptr.hs

diff --git a/Foreign/Ptr.hs b/Foreign/Ptr.hs
index b46acc1..26dda5c 100644 (file)
--- a/Foreign/Ptr.hs
+++ b/Foreign/Ptr.hs
@@ -4,6 +4,9 @@
            , MagicHash
            , GeneralizedNewtypeDeriving
   #-}
+#ifdef __GLASGOW_HASKELL__
+{-# LANGUAGE DeriveDataTypeable, StandaloneDeriving #-}
+#endif
 
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