diff --git a/config/boards/radxa-zero3.csc b/config/boards/radxa-zero3.csc
index a6a79b8cc2..b743c421ed 100644
--- a/config/boards/radxa-zero3.csc
+++ b/config/boards/radxa-zero3.csc
@@ -57,6 +57,7 @@ function post_family_tweaks__enable_aic8800_bluetooth_service() {
 }
 
 function post_family_config__use_mainline_uboot() {
+	[[ "${BRANCH}" == "vendor" ]] && return 0
 
 	unset BOOT_FDT_FILE # boot.scr will use whatever u-boot detects and sets 'fdtfile' to
 	unset BOOTFS_TYPE   # mainline u-boot can boot ext4 directly
@@ -74,6 +75,21 @@ function post_family_config__use_mainline_uboot() {
 
 	unset uboot_custom_postprocess write_uboot_platform write_uboot_platform_mtd
 
+	function write_uboot_platform() {
+		dd if=$1/u-boot-rockchip.bin of=$2 seek=64 conv=notrunc status=none
+	}
+}
+
+# Override family config for this board; let's avoid conditionals in family config.
+function post_family_config_branch_vendor__radxa-zero3_use_vendor_uboot() {
+	BOOTSOURCE='https://github.com/radxa/u-boot.git'
+	BOOTBRANCH='branch:rk35xx-2024.01'
+	BOOTPATCHDIR="u-boot-radxa-latest"
+
+	UBOOT_TARGET_MAP="BL31=$RKBIN_DIR/$BL31_BLOB ROCKCHIP_TPL=$RKBIN_DIR/$DDR_BLOB;;u-boot-rockchip.bin"
+
+	unset uboot_custom_postprocess write_uboot_platform write_uboot_platform_mtd
+
 	function write_uboot_platform() {
 		dd if=$1/u-boot-rockchip.bin of=$2 seek=64 conv=notrunc status=none
 	}