diff --git a/arch/mips/configs/loongson3_defconfig b/arch/mips/configs/loongson3_defconfig
index 77f6a3551f46a6a5eacff1b9746959708bbeb756..a18609cf0e5e46d9faf0e4f7cf25d29f0caec119 100644
--- a/arch/mips/configs/loongson3_defconfig
+++ b/arch/mips/configs/loongson3_defconfig
@@ -320,6 +320,7 @@ CONFIG_USB_OHCI_HCD=y
 CONFIG_USB_UHCI_HCD=m
 CONFIG_USB_STORAGE=m
 CONFIG_USB_SERIAL=m
+CONFIG_USB_SERIAL_PL2303=m
 CONFIG_USB_SERIAL_OPTION=m
 CONFIG_RTC_CLASS=y
 CONFIG_RTC_DRV_CMOS=y