diff --git a/configs/i12-tvbox_defconfig b/configs/i12-tvbox_defconfig
index 257dd89..d75a799 100644
--- a/configs/i12-tvbox_defconfig
+++ b/configs/i12-tvbox_defconfig
@@ -7,6 +7,7 @@
 CONFIG_MACPWR="PH21"
 CONFIG_VIDEO_COMPOSITE=y
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_SYS_MONITOR_LEN=786432
 CONFIG_SPL_I2C=y
 CONFIG_SYS_I2C_MVTWSI=y
 CONFIG_SYS_I2C_SLAVE=0x7f