diff --git a/meta-oniro-staging/recipes-bsp/uefi/edk2-firmware_%.bbappend b/meta-oniro-staging/recipes-bsp/uefi/edk2-firmware_%.bbappend
index 330d0611a3b8986ea8b1a926bff2553e6b5b4403..bcf04f8b084bc34124f92d84ed14768782b688ae 100644
--- a/meta-oniro-staging/recipes-bsp/uefi/edk2-firmware_%.bbappend
+++ b/meta-oniro-staging/recipes-bsp/uefi/edk2-firmware_%.bbappend
@@ -5,6 +5,8 @@
 export GCC5_ARM_PREFIX = "${TARGET_PREFIX}"
 export CLANG38_ARM_PREFIX = "${TARGET_PREFIX}"
 
+EDK2_BUILD_RELEASE:toolchain-clang = "1"
+
 do_install:prepend() {
 	# Some platforms use an ARCH suffix.
 	if [ ! -e "${B}/Build/${EDK2_PLATFORM}" ]; then