diff --git a/configs/alt_defconfig b/configs/alt_defconfig
index 46dc0a5..07a3d80 100644
--- a/configs/alt_defconfig
+++ b/configs/alt_defconfig
@@ -16,6 +16,7 @@
 CONFIG_SPL_SPI_FLASH_SUPPORT=y
 CONFIG_SPL_SPI_SUPPORT=y
 CONFIG_DEFAULT_DEVICE_TREE="r8a7794-alt-u-boot"
+CONFIG_NR_DRAM_BANKS=1
 CONFIG_FIT=y
 CONFIG_BOOTDELAY=3
 CONFIG_VERSION_VARIABLE=y