diff --git a/haddock-api/src/Haddock/Types.hs b/haddock-api/src/Haddock/Types.hs
index 273e08ae7c010ae8e6b36a5cdcc1781c9a460d1b..1fe9f71a75b276fa0cd95324f17e11917ae685cb 100644
--- a/haddock-api/src/Haddock/Types.hs
+++ b/haddock-api/src/Haddock/Types.hs
@@ -1049,7 +1049,7 @@ instance NFData EpaCommentTok where
   rnf (EpaDocOptions s)   = rnf s
   rnf (EpaLineComment s)  = rnf s
   rnf (EpaBlockComment s) = rnf s
-  rnf EpaEofComment       = ()
+  -- rnf (EpaCppIgnored s)   = rnf s
 
 
 instance NFData a => NFData (Strict.Maybe a) where
@@ -1072,4 +1072,3 @@ instance NFData AnchorOperation where
 instance NFData DeltaPos where
   rnf (SameLine n)        = rnf n
   rnf (DifferentLine n m) = n `deepseq` m `deepseq` ()
-