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-rw-r--r--libraries/base/GHC/MVar.hs5
1 files changed, 2 insertions, 3 deletions
diff --git a/libraries/base/GHC/MVar.hs b/libraries/base/GHC/MVar.hs
index a5054cc8fe..911c024128 100644
--- a/libraries/base/GHC/MVar.hs
+++ b/libraries/base/GHC/MVar.hs
@@ -1,5 +1,5 @@
{-# LANGUAGE Unsafe #-}
-{-# LANGUAGE NoImplicitPrelude, MagicHash, UnboxedTuples, AutoDeriveTypeable #-}
+{-# LANGUAGE NoImplicitPrelude, MagicHash, UnboxedTuples #-}
{-# OPTIONS_GHC -funbox-strict-fields #-}
{-# OPTIONS_HADDOCK hide #-}
@@ -33,9 +33,8 @@ module GHC.MVar (
) where
import GHC.Base
-import Data.Typeable
-data MVar a = MVar (MVar# RealWorld a) deriving( Typeable )
+data MVar a = MVar (MVar# RealWorld a)
{- ^
An 'MVar' (pronounced \"em-var\") is a synchronising variable, used
for communication between concurrent threads. It can be thought of