diff --git a/dev-ruby/chunky_png/chunky_png-1.4.0.ebuild b/dev-ruby/chunky_png/chunky_png-1.4.0.ebuild
index be9701dcf88420..7a7956982248cd 100644
--- a/dev-ruby/chunky_png/chunky_png-1.4.0.ebuild
+++ b/dev-ruby/chunky_png/chunky_png-1.4.0.ebuild
@@ -3,6 +3,7 @@
 
 EAPI=7
 
+# Can't do ruby32 until https://github.com/wvanbergen/chunky_png/pull/169 is merged
 USE_RUBY="ruby26 ruby27 ruby30 ruby31"
 
 RUBY_FAKEGEM_RECIPE_TEST="rspec3"