diff --git a/rebar.config b/rebar.config
index b7d167a..5a5e0c1 100644
--- a/rebar.config
+++ b/rebar.config
@@ -48,6 +48,9 @@
 
 {format, [{ignore, ["src/kpl_agg_pb.erl", "include/kpl_agg_pb.hrl"]}]}.
 
+%% The options for this app are converted to a map in erlmdl_app and then
+%% dynamically replaced in an .properties file. We can't detect unused
+%% configuration options. They're technically all used.
 {hank,
  [{ignore, ["src/kpl_agg_pb.erl", "include/kpl_agg_pb.hrl", "src/erlmld.app.src"]}]}.