diff --git a/imageio/imageio-tiff/src/main/java/com/twelvemonkeys/imageio/plugins/tiff/TIFFCustom.java b/imageio/imageio-tiff/src/main/java/com/twelvemonkeys/imageio/plugins/tiff/TIFFCustom.java
index 3a03ea31..d62652a2 100644
--- a/imageio/imageio-tiff/src/main/java/com/twelvemonkeys/imageio/plugins/tiff/TIFFCustom.java
+++ b/imageio/imageio-tiff/src/main/java/com/twelvemonkeys/imageio/plugins/tiff/TIFFCustom.java
@@ -50,6 +50,7 @@ interface TIFFCustom {
     int COMPRESSION_SGILOG = 34676;
     int COMPRESSION_SGILOG24 = 34677;
     int COMPRESSION_JPEG2000 = 34712;
+    // TODO: Aperio SVS JPEG2000: 33003 (YCbCr) and 33005 (RGB), see http://openslide.org/formats/aperio/
 
     int PHOTOMETRIC_LOGL = 32844;
     int PHOTOMETRIC_LOGLUV = 32845;