1 files changed, 2 insertions, 1 deletions
diff --git a/src/Text/Pandoc/Filter/Pyplot.hs b/src/Text/Pandoc/Filter/Pyplot.hs
index 1aa5c31..79eeb30 100644
--- a/src/Text/Pandoc/Filter/Pyplot.hs
+++ b/src/Text/Pandoc/Filter/Pyplot.hs
@@ -23,6 +23,7 @@ module Text.Pandoc.Filter.Pyplot (
 
 import           Control.Monad                  ((>=>))
 import qualified Data.Map.Strict                as M
+import           Data.Monoid                    ((<>))
 import           System.Directory               (doesDirectoryExist)
 import           System.FilePath                (isValid, replaceExtension, takeDirectory)
 
@@ -147,4 +148,4 @@ makePlot = makePlot' >=> either (fail . showError) return
 -- | Walk over an entire Pandoc document, changing appropriate code blocks
 -- into figures.
 plotTransform :: Pandoc -> IO Pandoc
-plotTransform = walkM makePlot
-\ No newline at end of file
+plotTransform = walkM makePlot