diff --git a/sys-devel/qbe/qbe-1.0.ebuild b/sys-devel/qbe/qbe-1.0.ebuild
index f493d7680b..3013cbf73f 100644
--- a/sys-devel/qbe/qbe-1.0.ebuild
+++ b/sys-devel/qbe/qbe-1.0.ebuild
@@ -8,6 +8,8 @@ if [[ "${PV}" == "9999" ]]; then
 	EGIT_REPO_URI="git://c9x.me/qbe.git"
 else
 	SRC_URI="https://c9x.me/compile/release/${P}.tar.xz"
+	# 64-bit RISC-V only
+	KEYWORDS="~amd64 ~arm64 ~riscv"
 fi
 
 DESCRIPTION="Pure-C embeddable compiler backend"
diff --git a/sys-devel/qbe/qbe-9999.ebuild b/sys-devel/qbe/qbe-9999.ebuild
index f493d7680b..3013cbf73f 100644
--- a/sys-devel/qbe/qbe-9999.ebuild
+++ b/sys-devel/qbe/qbe-9999.ebuild
@@ -8,6 +8,8 @@ if [[ "${PV}" == "9999" ]]; then
 	EGIT_REPO_URI="git://c9x.me/qbe.git"
 else
 	SRC_URI="https://c9x.me/compile/release/${P}.tar.xz"
+	# 64-bit RISC-V only
+	KEYWORDS="~amd64 ~arm64 ~riscv"
 fi
 
 DESCRIPTION="Pure-C embeddable compiler backend"