diff --git a/configs/comtrend_ar5315u_ram_defconfig b/configs/comtrend_ar5315u_ram_defconfig
index e319df8..92626d0 100644
--- a/configs/comtrend_ar5315u_ram_defconfig
+++ b/configs/comtrend_ar5315u_ram_defconfig
@@ -6,6 +6,7 @@
 # CONFIG_MIPS_BOOT_ENV_LEGACY is not set
 CONFIG_MIPS_BOOT_FDT=y
 CONFIG_DEFAULT_DEVICE_TREE="comtrend,ar-5315u"
+CONFIG_NR_DRAM_BANKS=1
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
 CONFIG_OF_STDOUT_VIA_ALIAS=y
 CONFIG_DISPLAY_CPUINFO=y