diff --git a/src/Text/Pandoc/Parsing.hs b/src/Text/Pandoc/Parsing.hs
index 110e34c6a..90cc20ab6 100644
--- a/src/Text/Pandoc/Parsing.hs
+++ b/src/Text/Pandoc/Parsing.hs
@@ -3,7 +3,9 @@
 , GeneralizedNewtypeDeriving
 , TypeSynonymInstances
 , MultiParamTypeClasses
-, FlexibleInstances #-}
+, FlexibleInstances
+, IncoherentInstances #-}
+
 {-
 Copyright (C) 2006-2016 John MacFarlane <jgm@berkeley.edu>