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-rw-r--r--compiler/simplCore/CSE.lhs2
1 files changed, 2 insertions, 0 deletions
diff --git a/compiler/simplCore/CSE.lhs b/compiler/simplCore/CSE.lhs
index 691f883d02..90715737c2 100644
--- a/compiler/simplCore/CSE.lhs
+++ b/compiler/simplCore/CSE.lhs
@@ -4,6 +4,8 @@
\section{Common subexpression}
\begin{code}
+{-# LANGUAGE CPP #-}
+
module CSE (cseProgram) where
#include "HsVersions.h"