diff --git a/dev-ruby/combustion/combustion-1.4.0.ebuild b/dev-ruby/combustion/combustion-1.4.0.ebuild
index c294438d24f57..445916d77ac4e 100644
--- a/dev-ruby/combustion/combustion-1.4.0.ebuild
+++ b/dev-ruby/combustion/combustion-1.4.0.ebuild
@@ -3,7 +3,7 @@
 
 EAPI=8
 
-USE_RUBY="ruby31 ruby32"
+USE_RUBY="ruby31 ruby32 ruby33"
 RUBY_FAKEGEM_BINWRAP=""
 RUBY_FAKEGEM_EXTRADOC="README.md"
 RUBY_FAKEGEM_GEMSPEC="${PN}.gemspec"