diff --git a/doc/TODO b/doc/TODO
index a8567a5ec3..6c0a824107 100644
--- a/doc/TODO
+++ b/doc/TODO
@@ -88,3 +88,4 @@ unassigned TODO: (unordered)
 - extract PES packetizer from PS muxer and use it for new TS muxer
 - implement automatic AVBistreamFilter activation
 - make cabac encoder use bytestream (see http://trac.videolan.org/x264/changeset/?format=diff&new=651)
+- merge imdct and windowing, the current code does considerable amounts of redundant work