diff --git a/configs/mscc_luton_defconfig b/configs/mscc_luton_defconfig
index c1908f2..8364e49 100644
--- a/configs/mscc_luton_defconfig
+++ b/configs/mscc_luton_defconfig
@@ -6,6 +6,7 @@
 CONFIG_ENV_SIZE=0x2000
 CONFIG_ENV_OFFSET=0x100000
 CONFIG_ENV_SECT_SIZE=0x40000
+CONFIG_SYS_MALLOC_LEN=0x1f0000
 CONFIG_DM_GPIO=y
 CONFIG_DEFAULT_DEVICE_TREE="luton_pcb091"
 CONFIG_DEBUG_UART_BOARD_INIT=y