diff --git a/haddock-api.cabal b/haddock-api.cabal
--- a/haddock-api.cabal
+++ b/haddock-api.cabal
@@ -1,5 +1,5 @@
 name:                 haddock-api
-version:              2.17.3
+version:              2.17.3.1
 synopsis:             A documentation-generation tool for Haskell libraries
 description:          Haddock is a documentation-generation tool for Haskell
                       libraries
diff --git a/src/Haddock/Types.hs b/src/Haddock/Types.hs
--- a/src/Haddock/Types.hs
+++ b/src/Haddock/Types.hs
@@ -1,4 +1,6 @@
-{-# LANGUAGE DeriveDataTypeable, DeriveFunctor, DeriveFoldable, DeriveTraversable, StandaloneDeriving, TypeFamilies, RecordWildCards #-}
+{-# LANGUAGE CPP #-}
+{-# LANGUAGE DeriveDataTypeable, DeriveFunctor, DeriveFoldable, DeriveTraversable, StandaloneDeriving #-}
+{-# LANGUAGE TypeFamilies, RecordWildCards #-}
 {-# OPTIONS_GHC -fno-warn-orphans #-}
 -----------------------------------------------------------------------------
 -- |
@@ -447,10 +449,12 @@
     DocExamples a             -> a `deepseq` ()
     DocHeader a               -> a `deepseq` ()
 
-
+#if !MIN_VERSION_ghc(8,0,2)
+-- These were added to GHC itself in 8.0.2
 instance NFData Name where rnf x = seq x ()
 instance NFData OccName where rnf x = seq x ()
 instance NFData ModuleName where rnf x = seq x ()
+#endif
 
 instance NFData id => NFData (Header id) where
   rnf (Header a b) = a `deepseq` b `deepseq` ()