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-rw-r--r--compiler/utils/FastBool.lhs2
1 files changed, 2 insertions, 0 deletions
diff --git a/compiler/utils/FastBool.lhs b/compiler/utils/FastBool.lhs
index 32cb7aef3a..9558da7079 100644
--- a/compiler/utils/FastBool.lhs
+++ b/compiler/utils/FastBool.lhs
@@ -4,6 +4,8 @@
\section{Fast booleans}
\begin{code}
+{-# LANGUAGE CPP, MagicHash #-}
+
module FastBool (
--fastBool could be called bBox; isFastTrue, bUnbox; but they're not
FastBool, fastBool, isFastTrue, fastOr, fastAnd