diff --git a/TODO.txt b/TODO.txt
index 502961c8..db7ffe48 100644
--- a/TODO.txt
+++ b/TODO.txt
@@ -4,6 +4,8 @@ Version 0.10
 * Remove deprecated parameter `epsilon` of `skimage.viewer.LineProfile`
 * Remove backwards-compatability of `skimage.measure.regionprops`
 * Remove {`ratio`, `sigma`} deprecation warnings of `skimage.segmentation.slic`
+* Change default mode of random_walker segmentation to 'cg_mg' > 'cg' > 'bf',
+  depending on which optional dependencies are available.
 
 Version 0.9
 -----------