diff --git a/TODO b/TODO
index 09878425..f5f3fbec 100644
--- a/TODO
+++ b/TODO
@@ -1,5 +1,7 @@
 - fix gtk-doc, again
 
+  look at sharpen graph
+
 - cpp bandjoin should use bandjoin_const() where possible ... currently 
   uses new_from_image