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-rw-r--r--src/Text/Pandoc/Lua/Filter.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/Text/Pandoc/Lua/Filter.hs b/src/Text/Pandoc/Lua/Filter.hs
index 8db31e7fa..687ab2be5 100644
--- a/src/Text/Pandoc/Lua/Filter.hs
+++ b/src/Text/Pandoc/Lua/Filter.hs
@@ -103,7 +103,7 @@ walkMWithLuaFilter :: LuaFilter -> Pandoc -> Lua Pandoc
walkMWithLuaFilter f =
walkInlines f >=> walkBlocks f >=> walkMeta f >=> walkPandoc f
-mconcatMapM :: Monad m => (a -> m [a]) -> [a] -> m [a]
+mconcatMapM :: (Monad m, Functor m) => (a -> m [a]) -> [a] -> m [a]
mconcatMapM f = fmap mconcat . mapM f
hasOneOf :: LuaFilter -> [String] -> Bool