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-rw-r--r--src/Text/Pandoc/Readers/Odt/Arrows/State.hs4
1 files changed, 1 insertions, 3 deletions
diff --git a/src/Text/Pandoc/Readers/Odt/Arrows/State.hs b/src/Text/Pandoc/Readers/Odt/Arrows/State.hs
index 73bed545e..202118669 100644
--- a/src/Text/Pandoc/Readers/Odt/Arrows/State.hs
+++ b/src/Text/Pandoc/Readers/Odt/Arrows/State.hs
@@ -1,4 +1,3 @@
-
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE TupleSections #-}
{-
@@ -45,7 +44,6 @@ import qualified Control.Category as Cat
import Control.Monad
import Data.Foldable
-import Data.Monoid
import Text.Pandoc.Readers.Odt.Arrows.Utils
import Text.Pandoc.Readers.Odt.Generic.Fallible
@@ -131,7 +129,7 @@ withSubStateF' unlift a = ArrowState go
-- and one with any function.
foldS :: (Foldable f, Monoid m) => ArrowState s x m -> ArrowState s (f x) m
foldS a = ArrowState $ \(s,f) -> foldr a' (s,mempty) f
- where a' x (s',m) = second (m <>) $ runArrowState a (s',x)
+ where a' x (s',m) = second (mappend m) $ runArrowState a (s',x)
-- | Fold a state arrow through something 'Foldable'. Collect the results in a
-- 'MonadPlus'.