From 6094c84b7ae0e00d51c16e7e283ad2e589091bee Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Sat, 11 Nov 2017 21:13:43 -0800
Subject: Functor instance to fix ghc 7.8 warning.

---
 src/Text/Pandoc/Lua/Filter.hs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/Text/Pandoc/Lua')

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
-- 
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