1 files changed, 1 insertions, 0 deletions
diff --git a/src/Text/Pandoc/Class.hs b/src/Text/Pandoc/Class.hs
index 7c518e84b..2b8b1c090 100644
--- a/src/Text/Pandoc/Class.hs
+++ b/src/Text/Pandoc/Class.hs
@@ -2,6 +2,7 @@
 {-# LANGUAGE PatternGuards #-}
 {-# LANGUAGE DeriveFunctor #-}
 {-# LANGUAGE TypeSynonymInstances #-}
+{-# LANGUAGE MultiParamTypeClasses #-}
 {-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE GeneralizedNewtypeDeriving #-}
 {-# LANGUAGE FlexibleContexts #-}