diff --git a/configs/at91sam9g20ek_dataflash_cs1_defconfig b/configs/at91sam9g20ek_dataflash_cs1_defconfig
index 94ed68d..c5db163 100644
--- a/configs/at91sam9g20ek_dataflash_cs1_defconfig
+++ b/configs/at91sam9g20ek_dataflash_cs1_defconfig
@@ -8,6 +8,7 @@
 CONFIG_DEBUG_UART_CLOCK=132000000
 CONFIG_DEFAULT_DEVICE_TREE="at91sam9g20ek"
 CONFIG_DEBUG_UART=y
+CONFIG_NR_DRAM_BANKS=1
 CONFIG_SYS_EXTRA_OPTIONS="AT91SAM9G20,SYS_USE_DATAFLASH_CS1"
 CONFIG_BOOTDELAY=3
 CONFIG_USE_BOOTARGS=y