diff --git a/demos/WB32/RT-WB32F3G71-RTC/Makefile b/demos/WB32/RT-WB32F3G71-RTC/Makefile
index e23442dd31..92711c3f92 100644
--- a/demos/WB32/RT-WB32F3G71-RTC/Makefile
+++ b/demos/WB32/RT-WB32F3G71-RTC/Makefile
@@ -126,13 +126,14 @@ LDSCRIPT= $(STARTUPLD_CONTRIB)/WB32F3G71xC.ld
 CSRC = $(ALLCSRC) \
        $(TESTSRC) \
        $(CHIBIOS)/os/various/syscalls.c \
-       $(CHIBIOS)/os/common/lib/src/chprintf.c \
+       $(CHIBIOS)/os/hal/lib/streams/chprintf.c \
        debug.c \
        main.c
 
 ALLINC += ./ \
     $(CHIBIOS)/os/common/lib/include \
-    $(CHIBIOS)/os/common/oop/include
+    $(CHIBIOS)/os/common/oop/include \
+    $(CHIBIOS)/os/hal/lib/streams
 
 
 
diff --git a/demos/WB32/RT-WB32F3G71-RTC/main.c b/demos/WB32/RT-WB32F3G71-RTC/main.c
index 44d63e6c2b..534b0f94c2 100644
--- a/demos/WB32/RT-WB32F3G71-RTC/main.c
+++ b/demos/WB32/RT-WB32F3G71-RTC/main.c
@@ -121,7 +121,7 @@ int main(void) {
   while (true){
     chThdSleepSeconds(2);
     rtcGetTime(&RTCD1, &timespec);
-    chprintf((sequential_stream_i *)&SERIAL_DEBUG_DRIVER, 
+    chprintf((BaseSequentialStream *)&SERIAL_DEBUG_DRIVER, 
              "lsi sleep %ds year = %d  month = %d  dstflag=%d  dayofweek = %d  day = %d  millisecond = %d\r\n",
              RTC_ALARMPERIOD, timespec.year, timespec.month, timespec.dstflag, timespec.dayofweek, timespec.day, timespec.millisecond);
     chThdSleepSeconds(3);