diff --git a/lib/growth/indicators/download.ex b/lib/growth/indicators/download.ex
index 95f2f13..9caff54 100644
--- a/lib/growth/indicators/download.ex
+++ b/lib/growth/indicators/download.ex
@@ -249,6 +249,7 @@ defmodule Growth.Indicators.Download do
 
   @common_header ~w(source gender age_unit age l m s sd3neg sd2neg sd1neg sd0 sd1 sd2 sd3)
 
+  # FIX: (jpd) weight for lenght/height does not have an age in the header row
   def convert([header | rows], gender, url) do
     age_unit = header |> hd() |> String.downcase()