diff --git a/configs/rock-pi-4c-rk3399_defconfig b/configs/rock-pi-4c-rk3399_defconfig
index bda4b70..2338154 100644
--- a/configs/rock-pi-4c-rk3399_defconfig
+++ b/configs/rock-pi-4c-rk3399_defconfig
@@ -16,6 +16,8 @@
 CONFIG_DEFAULT_FDT_FILE="rockchip/rk3399-rock-pi-4c.dtb"
 CONFIG_DISPLAY_BOARDINFO_LATE=y
 CONFIG_MISC_INIT_R=y
+CONFIG_SPL_MAX_SIZE=0x2e000
+CONFIG_SPL_PAD_TO=0x7f8000
 # CONFIG_SPL_RAW_IMAGE_SUPPORT is not set
 CONFIG_SPL_STACK_R=y
 CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN=0x10000