diff --git a/configs/orangepi_zero_defconfig b/configs/orangepi_zero_defconfig
index f7f3bfb..5700c1b 100644
--- a/configs/orangepi_zero_defconfig
+++ b/configs/orangepi_zero_defconfig
@@ -7,6 +7,7 @@
 # CONFIG_VIDEO_DE2 is not set
 CONFIG_SPL_SPI_SUNXI=y
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_SYS_MONITOR_LEN=786432
 CONFIG_CONSOLE_MUX=y
 CONFIG_SPI_FLASH_MACRONIX=y
 CONFIG_SPI_FLASH_WINBOND=y