diff --git a/dev-ruby/mutex_m/mutex_m-0.2.0.ebuild b/dev-ruby/mutex_m/mutex_m-0.2.0.ebuild
index 543e417415fc1..052b85e0306b7 100644
--- a/dev-ruby/mutex_m/mutex_m-0.2.0.ebuild
+++ b/dev-ruby/mutex_m/mutex_m-0.2.0.ebuild
@@ -2,7 +2,8 @@
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
-USE_RUBY="ruby31 ruby32 ruby33"
+
+USE_RUBY="ruby32 ruby33 ruby34"
 
 RUBY_FAKEGEM_BINWRAP=""
 RUBY_FAKEGEM_EXTRADOC="README.md"
@@ -17,7 +18,6 @@ SRC_URI="https://github.com/ruby/mutex_m/archive/v${PV}.tar.gz -> ${P}.tar.gz"
 LICENSE="BSD-2"
 SLOT="$(ver_cut 1-2)"
 KEYWORDS="~alpha amd64 arm arm64 ~hppa ~loong ~mips ppc ppc64 ~riscv ~s390 sparc x86 ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x64-solaris"
-IUSE=""
 
 all_ruby_prepare() {
 	sed -e 's:_relative ": "./:' \