diff --git a/bsp/lpc176x/rtconfig.h b/bsp/lpc176x/rtconfig.h
index bbcf1612eb958aa26d1644f14955e51fc64806c5..33c563a5886b20ec1a0d25bfe37f54902f65931f 100644
--- a/bsp/lpc176x/rtconfig.h
+++ b/bsp/lpc176x/rtconfig.h
@@ -183,9 +183,9 @@
 // <bool name="RT_USING_CMSIS_OS" description="Using CMSIS OS API" default="true" />
 // #define RT_USING_CMSIS_OS
 // <bool name="RT_USING_RTT_CMSIS" description="Using CMSIS in RTT" default="true" />
-// #define RT_USING_RTT_CMSIS
+#define RT_USING_RTT_CMSIS
 // <bool name="RT_USING_BSP_CMSIS" description="Using CMSIS in BSP" default="true" />
-#define RT_USING_BSP_CMSIS
+// #define RT_USING_BSP_CMSIS
 
 // </RDTConfigurator>