diff --git a/configs/ae350_rv64_defconfig b/configs/ae350_rv64_defconfig
index 477329f..cab5a38 100644
--- a/configs/ae350_rv64_defconfig
+++ b/configs/ae350_rv64_defconfig
@@ -16,6 +16,7 @@
 CONFIG_BOARD_EARLY_INIT_F=y
 CONFIG_SYS_PROMPT="RISC-V # "
 CONFIG_SYS_PBSIZE=1050
+CONFIG_SYS_BOOTM_LEN=0x4000000
 CONFIG_CMD_IMLS=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_SF_TEST=y