diff --git a/eclass/go-mono.eclass b/eclass/go-mono.eclass
index 5ab6b671caec4..df23356b91c45 100644
--- a/eclass/go-mono.eclass
+++ b/eclass/go-mono.eclass
@@ -1,6 +1,13 @@
 # Copyright 1999-2013 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 
+# @DEAD
+# Michał Górny <mgorny@gentoo.org> (17 Jun 2018)
+# This eclass was used for old versions of Mono applications, and all
+# versions using it have been removed already.  It's not maintained,
+# uses obsolete (even removed) eclasses, outdated URIs, it has
+# documentation problems.  Removal in 30 days.
+
 # @ECLASS: go-mono.eclass
 # @MAINTAINER:
 # dotnet@gentoo.org