diff --git a/profiles/arch/riscv/package.use.mask b/profiles/arch/riscv/package.use.mask
index 0c5b80097152d..77e4216ee7c36 100644
--- a/profiles/arch/riscv/package.use.mask
+++ b/profiles/arch/riscv/package.use.mask
@@ -1,6 +1,10 @@
 # Copyright 2019-2020 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
+# Zac Medico <zmedico@gentoo.org> (2020-05-09)
+# Mask until app-arch/lz4 is keyworded
+app-arch/zstd lz4
+
 # Sergei Trofimovich <slyfox@gentoo.org> (2020-05-07)
 # Mask until app-arch/zstd is keyworded
 sys-devel/gcc zstd