diff --git a/configs/mx51evk_defconfig b/configs/mx51evk_defconfig
index 4500064..bc2dfde 100644
--- a/configs/mx51evk_defconfig
+++ b/configs/mx51evk_defconfig
@@ -5,6 +5,7 @@
 CONFIG_ENV_SIZE=0x2000
 CONFIG_ENV_OFFSET=0xC0000
 CONFIG_TARGET_MX51EVK=y
+CONFIG_SYS_MALLOC_LEN=0xa00000
 CONFIG_DM_GPIO=y
 CONFIG_DEFAULT_DEVICE_TREE="imx51-babbage"
 # CONFIG_CMD_BMODE is not set