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-rw-r--r--src/Text/Pandoc/App.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/Text/Pandoc/App.hs b/src/Text/Pandoc/App.hs
index a4f48e336..be8f26811 100644
--- a/src/Text/Pandoc/App.hs
+++ b/src/Text/Pandoc/App.hs
@@ -337,7 +337,7 @@ convertWithOpts opts = do
then 0
else optTabStop opts)
- readSources :: MonadIO m => [FilePath] -> m String
+ readSources :: (Functor m, MonadIO m) => [FilePath] -> m String
readSources srcs = convertTabs . intercalate "\n" <$>
mapM readSource srcs