1 files changed, 1 insertions, 0 deletions
diff --git a/muse2/muse/undo.h b/muse2/muse/undo.h
index b17e8e21..eb5600ef 100644
--- a/muse2/muse/undo.h
+++ b/muse2/muse/undo.h
@@ -33,6 +33,7 @@ struct UndoOp {
             AddEvent, DeleteEvent, ModifyEvent,
             AddTempo, DeleteTempo,
             AddSig,   DeleteSig,
+            AddKey,   DeleteKey,
             SwapTrack,
             ModifyClip,
             ModifyMarker