diff --git a/configs/tbs_a711_defconfig b/configs/tbs_a711_defconfig
index b3c2e69..6c3d5d4 100644
--- a/configs/tbs_a711_defconfig
+++ b/configs/tbs_a711_defconfig
@@ -13,6 +13,7 @@
 CONFIG_USB0_ID_DET="PH11"
 CONFIG_AXP_GPIO=y
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_SYS_MONITOR_LEN=786432
 CONFIG_FASTBOOT_CMD_OEM_FORMAT=y
 CONFIG_AXP_DCDC5_VOLT=1200
 CONFIG_USB_EHCI_HCD=y