diff --git a/arch/mips/configs/rzx50_defconfig b/arch/mips/configs/rzx50_defconfig
index 5d994c7..7b75909 100644
--- a/arch/mips/configs/rzx50_defconfig
+++ b/arch/mips/configs/rzx50_defconfig
@@ -1,4 +1,5 @@
 CONFIG_MACH_MIPS_XBURST=y
+CONFIG_JZ4750D_DEBUG_LL_UART1=y
 CONFIG_PBL_IMAGE=y
 CONFIG_BAUDRATE=57600
 CONFIG_GLOB=y