1 files changed, 1 insertions, 0 deletions
diff --git a/TODO.md b/TODO.md
index 5272a591..86299fdf 100644
--- a/TODO.md
+++ b/TODO.md
@@ -47,6 +47,7 @@ Next
   cleaned up. See also issue #22.
   * Make it possible to see incremental updates in qdf mode.
   * Make it possible to add incremental updates.
+  * We may want a writing mode that preserves object IDs. See #339.
 
 Possible future JSON enhancements
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