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-rw-r--r--haddock-library/src/Documentation/Haddock/Parser/Monad.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/haddock-library/src/Documentation/Haddock/Parser/Monad.hs b/haddock-library/src/Documentation/Haddock/Parser/Monad.hs
index a421c58c..3f7d60f8 100644
--- a/haddock-library/src/Documentation/Haddock/Parser/Monad.hs
+++ b/haddock-library/src/Documentation/Haddock/Parser/Monad.hs
@@ -42,7 +42,7 @@ import Data.Tuple
import Documentation.Haddock.Types (Version)
-data ParserState = ParserState {
+newtype ParserState = ParserState {
parserStateSince :: Maybe Version
} deriving (Eq, Show)