diff --git a/arch/arm/configs/rk3188_LR097_defconfig b/arch/arm/configs/rk3188_LR097_defconfig
index 3e39f55e84c9..ca33bd55fb32 100644
--- a/arch/arm/configs/rk3188_LR097_defconfig
+++ b/arch/arm/configs/rk3188_LR097_defconfig
@@ -26,6 +26,7 @@ CONFIG_DDR_SDRAM_FREQ=300
 CONFIG_DDR_FREQ=y
 CONFIG_RK_CLOCK_PROC=y
 CONFIG_CLK_SWITCH_TO_32K=y
+CONFIG_RK_USB_UART=y
 CONFIG_MACH_RK3188_LR097=y
 CONFIG_FIQ_DEBUGGER=y
 CONFIG_FIQ_DEBUGGER_NO_SLEEP=y