diff --git a/src/Renderer/JSON.hs b/src/Renderer/JSON.hs
index 67952c1ed..8f11fb2b3 100644
--- a/src/Renderer/JSON.hs
+++ b/src/Renderer/JSON.hs
@@ -29,9 +29,10 @@ import Term
 -- | Render a diff to a string representing its JSON.
 json :: Renderer a ByteString
 json diff sources = toLazyByteString . fromEncoding . pairs $
-     "rows" .= Prelude.fst (splitDiffByLines diff (pure 0) (source <$> sources))
+     "rows" .= annotateRows (Prelude.fst (splitDiffByLines diff (pure 0) (source <$> sources)))
   <> "oids" .= (oid <$> sources)
   <> "paths" .= (path <$> sources)
+  where annotateRows = fmap unRow
 
 instance ToJSON Category where
   toJSON (Other s) = String $ T.pack s