diff --git a/configs/evb-rk3128_defconfig b/configs/evb-rk3128_defconfig
index ac38d5e..6526933 100644
--- a/configs/evb-rk3128_defconfig
+++ b/configs/evb-rk3128_defconfig
@@ -18,6 +18,7 @@
 CONFIG_DEFAULT_FDT_FILE="rk3128-evb.dtb"
 # CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_DISPLAY_BOARDINFO_LATE=y
+CONFIG_SYS_BOOTM_LEN=0x4000000
 CONFIG_CMD_GPT=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_USB=y