2 files changed, 4 insertions, 2 deletions
diff --git a/os/various/chrtclib.c b/os/various/chrtclib.c
index 888ef3a9b..04b3cb25c 100644
--- a/os/various/chrtclib.c
+++ b/os/various/chrtclib.c
@@ -328,8 +328,6 @@ uint64_t rtcGetTimeUnixUsec(RTCDriver *rtcp) {
   return (uint64_t)rtcGetTimeUnixSec(rtcp) * 1000000;
 #endif
 }
-#endif /* STM32_RTC_IS_CALENDAR */
-#endif /* (defined(STM32F4XX) || defined(STM32F2XX) || defined(STM32L1XX) || defined(STM32F1XX)) */
 
 /**
  * @brief   Get current time in format suitable for usage in FatFS.
@@ -354,5 +352,7 @@ uint32_t rtcGetTimeFat(RTCDriver *rtcp) {
 
   return fattime;
 }
+#endif /* STM32_RTC_IS_CALENDAR */
+#endif /* (defined(STM32F4XX) || defined(STM32F2XX) || defined(STM32L1XX) || defined(STM32F1XX)) */
 
 /** @} */
diff --git a/os/various/chrtclib.h b/os/various/chrtclib.h
index c41706f87..c6f6c8d45 100644
--- a/os/various/chrtclib.h
+++ b/os/various/chrtclib.h
@@ -42,7 +42,9 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
+#if !STM32_RTC_IS_CALENDAR
   uint32_t rtcGetTimeFat(RTCDriver *rtcp);
+#endif
   void rtcGetTimeTm(RTCDriver *rtcp, struct tm *timp);
   void rtcSetTimeTm(RTCDriver *rtcp, struct tm *timp);
   time_t rtcGetTimeUnixSec(RTCDriver *rtcp);