diff --git a/configs/M5235EVB_defconfig b/configs/M5235EVB_defconfig
index 4e0491c..d271144 100644
--- a/configs/M5235EVB_defconfig
+++ b/configs/M5235EVB_defconfig
@@ -2,6 +2,7 @@
 CONFIG_SYS_TEXT_BASE=0xFFE00000
 CONFIG_ENV_SIZE=0x2000
 CONFIG_ENV_SECT_SIZE=0x2000
+CONFIG_SYS_MALLOC_LEN=0x20000
 CONFIG_DEFAULT_DEVICE_TREE="M5235EVB"
 CONFIG_TARGET_M5235EVB=y
 CONFIG_SYS_LOAD_ADDR=0x20000