diff --git a/sys-apps/openrc/openrc-9999.ebuild b/sys-apps/openrc/openrc-9999.ebuild
index 6e1cab8b75a77..4ea93e65a4f0c 100644
--- a/sys-apps/openrc/openrc-9999.ebuild
+++ b/sys-apps/openrc/openrc-9999.ebuild
@@ -57,7 +57,6 @@ src_configure() {
 		$(meson_feature audit)
 		"-Dbranding=\"Gentoo Linux\""
 		$(meson_use newnet)
-		-Dos=Linux
 		$(meson_use pam)
 		-Dpam_libdir="$(getpam_mod_dir)"
 		$(meson_feature selinux)