diff --git a/configs/evb-rk3229_defconfig b/configs/evb-rk3229_defconfig
index f44dec0..ebf13c3 100644
--- a/configs/evb-rk3229_defconfig
+++ b/configs/evb-rk3229_defconfig
@@ -36,6 +36,7 @@
 CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN=0x2000
 CONFIG_SPL_OPTEE_IMAGE=y
 CONFIG_TPL_MAX_SIZE=0x100000
+CONFIG_SYS_BOOTM_LEN=0x4000000
 CONFIG_CMD_GPT=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_USB_MASS_STORAGE=y