diff --git a/testing/php8-pecl-grpc/APKBUILD b/testing/php8-pecl-grpc/APKBUILD
index 1dcf9319d0a..bb7e745a0fa 100644
--- a/testing/php8-pecl-grpc/APKBUILD
+++ b/testing/php8-pecl-grpc/APKBUILD
@@ -5,7 +5,7 @@ pkgver=1.34.0
 pkgrel=0
 pkgdesc="PHP extension provide a concrete implementation of the gRPC protocol, layered over HTTP/2."
 url="https://pecl.php.net/package/grpc"
-arch="all !s390x !ppc64le !armv7 !armhf" # armv7, armhf, ppc64le: build failures
+arch="all !s390x !ppc64le !armv7 !armhf !riscv64" # armv7, armhf, ppc64le: build failures
 license="Apache-2.0"
 depends="php8-common"
 makedepends="php8-dev openssl-dev linux-headers"