1 files changed, 6 insertions, 1 deletions
diff --git a/compiler/cmm/CmmNode.hs b/compiler/cmm/CmmNode.hs
index 5c520d3899..7eb2b61d9a 100644
--- a/compiler/cmm/CmmNode.hs
+++ b/compiler/cmm/CmmNode.hs
@@ -1,9 +1,14 @@
--- CmmNode type for representation using Hoopl graphs.
+{-# LANGUAGE CPP #-}
+{-# LANGUAGE ExplicitForAll #-}
 {-# LANGUAGE FlexibleContexts #-}
+{-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE GADTs #-}
+{-# LANGUAGE MultiParamTypeClasses #-}
 {-# LANGUAGE StandaloneDeriving #-}
 {-# LANGUAGE UndecidableInstances #-}
 
+-- CmmNode type for representation using Hoopl graphs.
+
 module CmmNode (
      CmmNode(..), CmmFormal, CmmActual,
      UpdFrameOffset, Convention(..),