diff --git a/configs/at91sam9n12ek_mmc_defconfig b/configs/at91sam9n12ek_mmc_defconfig
index 33a3e68..5d0640a 100644
--- a/configs/at91sam9n12ek_mmc_defconfig
+++ b/configs/at91sam9n12ek_mmc_defconfig
@@ -8,6 +8,7 @@
 CONFIG_DEBUG_UART_CLOCK=132000000
 CONFIG_DEFAULT_DEVICE_TREE="at91sam9n12ek"
 CONFIG_DEBUG_UART=y
+CONFIG_NR_DRAM_BANKS=1
 CONFIG_SD_BOOT=y
 CONFIG_BOOTDELAY=3
 # CONFIG_CONSOLE_MUX is not set