diff --git a/configs/rock_defconfig b/configs/rock_defconfig
index 3218c62..9842f03 100644
--- a/configs/rock_defconfig
+++ b/configs/rock_defconfig
@@ -12,6 +12,7 @@
 CONFIG_SPL_STACK_R_ADDR=0x60080000
 CONFIG_DEFAULT_DEVICE_TREE="rk3188-radxarock"
 CONFIG_DEBUG_UART=y
+CONFIG_NR_DRAM_BANKS=1
 CONFIG_DEFAULT_FDT_FILE="rk3188-radxarock.dtb"
 # CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_DISPLAY_BOARDINFO_LATE=y