diff --git a/src/one-body-sample.parset b/src/one-body-sample.parset
index 1a0ce4b25f22756ad0109352f27c32388779c6a3..7b07d06886fcf9af6c1c8b2ba0a97cea27c8f2a3 100644
--- a/src/one-body-sample.parset
+++ b/src/one-body-sample.parset
@@ -41,6 +41,7 @@ nu1 = 1
 mu = 1
 nu2 = 0 # FIXME: using linear postsmoothing appears to be a really bad idea
 
+## TODO: what exactly reproduces a plain gauss-seidel step?
 [solver.tnnmg.main]
 # The canonical choice is 3-1-3. Since the nonlinear step is by far
 # the costliest, this is a lot more costly than 1-1-1. The number of