diff --git a/configs/Bananapi_m2m_defconfig b/configs/Bananapi_m2m_defconfig
index bad38a6..0e73265 100644
--- a/configs/Bananapi_m2m_defconfig
+++ b/configs/Bananapi_m2m_defconfig
@@ -10,6 +10,7 @@
 CONFIG_MMC_SUNXI_SLOT_EXTRA=2
 CONFIG_USB0_ID_DET="PH8"
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_SYS_MONITOR_LEN=786432
 CONFIG_FASTBOOT_CMD_OEM_FORMAT=y
 CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_OHCI_HCD=y