diff --git a/configs/mscc_luton_defconfig b/configs/mscc_luton_defconfig
index 722a585..8eebe7b 100644
--- a/configs/mscc_luton_defconfig
+++ b/configs/mscc_luton_defconfig
@@ -32,6 +32,7 @@
 CONFIG_SYS_PBSIZE=281
 # CONFIG_CMD_BDI is not set
 # CONFIG_CMD_CONSOLE is not set
+CONFIG_SYS_BOOTM_LEN=0x1000000
 # CONFIG_CMD_ELF is not set
 # CONFIG_CMD_EXPORTENV is not set
 # CONFIG_CMD_IMPORTENV is not set