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-rw-r--r--src/Haddock/Exception.hs3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/Haddock/Exception.hs b/src/Haddock/Exception.hs
index 385f36a9..a1886ba2 100644
--- a/src/Haddock/Exception.hs
+++ b/src/Haddock/Exception.hs
@@ -5,6 +5,9 @@
--
+{-# LANGUAGE DeriveDataTypeable #-}
+
+
module Haddock.Exception (
HaddockException,
throwE