diff --git a/configs/at91sam9x5ek_mmc_defconfig b/configs/at91sam9x5ek_mmc_defconfig
index 357cab9..b9d7246 100644
--- a/configs/at91sam9x5ek_mmc_defconfig
+++ b/configs/at91sam9x5ek_mmc_defconfig
@@ -17,6 +17,7 @@
 CONFIG_DEBUG_UART=y
 CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR=y
 CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0x20003ef0
+CONFIG_SYS_MONITOR_LEN=524288
 CONFIG_FIT=y
 CONFIG_SD_BOOT=y
 CONFIG_BOOTDELAY=3