diff --git a/configs/gwventana_emmc_defconfig b/configs/gwventana_emmc_defconfig
index ea9e7e2..0516176 100644
--- a/configs/gwventana_emmc_defconfig
+++ b/configs/gwventana_emmc_defconfig
@@ -57,6 +57,7 @@
 CONFIG_SYS_MAXARGS=32
 CONFIG_SYS_PBSIZE=539
 CONFIG_CMD_BOOTZ=y
+CONFIG_SYS_BOOTM_LEN=0x4000000
 CONFIG_CMD_SPL_WRITE_SIZE=0x20000
 CONFIG_CMD_UNZIP=y
 # CONFIG_CMD_FLASH is not set