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-rw-r--r--compiler/simplCore/SimplEnv.lhs2
1 files changed, 2 insertions, 0 deletions
diff --git a/compiler/simplCore/SimplEnv.lhs b/compiler/simplCore/SimplEnv.lhs
index 5f1013def8..1c5ebc501b 100644
--- a/compiler/simplCore/SimplEnv.lhs
+++ b/compiler/simplCore/SimplEnv.lhs
@@ -4,6 +4,8 @@
\section[SimplMonad]{The simplifier Monad}
\begin{code}
+{-# LANGUAGE CPP #-}
+
module SimplEnv (
InId, InBind, InExpr, InAlt, InArg, InType, InBndr, InVar,
OutId, OutTyVar, OutBind, OutExpr, OutAlt, OutArg, OutType, OutBndr, OutVar,