diff --git a/src/Rubyhs/References.hs b/src/Rubyhs/References.hs
index e272ca7..37e0c9b 100644
--- a/src/Rubyhs/References.hs
+++ b/src/Rubyhs/References.hs
@@ -200,6 +200,8 @@ instance References Ruby.RBlock where
     entries block
 instance References Ruby.RArgs where
   entries = const $ pure ()
+-- TODO: We have to make a "declaration" for the constant here as
+-- well!
 instance References Ruby.Casgn where
   entries Casgn{name, statement} = entries statement
 instance References Ruby.RArray where