diff --git a/configs/nanopi_neo_air_defconfig b/configs/nanopi_neo_air_defconfig
index 9598bd5cd5..aedbac75c8 100644
--- a/configs/nanopi_neo_air_defconfig
+++ b/configs/nanopi_neo_air_defconfig
@@ -8,6 +8,7 @@ CONFIG_DEFAULT_DEVICE_TREE="sun8i-h3-nanopi-neo-air"
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
 CONFIG_CONSOLE_MUX=y
 CONFIG_SPL=y
+CONFIG_MMC_SUNXI_SLOT_EXTRA=2
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_FLASH is not set
 # CONFIG_CMD_FPGA is not set