diff --git a/configs/kmnusa_defconfig b/configs/kmnusa_defconfig
index 8cbde0e..a309aca 100644
--- a/configs/kmnusa_defconfig
+++ b/configs/kmnusa_defconfig
@@ -35,6 +35,7 @@
 # CONFIG_BOOTM_PLAN9 is not set
 # CONFIG_BOOTM_RTEMS is not set
 # CONFIG_BOOTM_VXWORKS is not set
+CONFIG_SYS_BOOTM_LEN=0x2000000
 CONFIG_CMD_ASKENV=y
 CONFIG_CMD_GREPENV=y
 CONFIG_CMD_EEPROM=y