diff --git a/src/SystemClock.cpp b/src/SystemClock.cpp
index 58d8b0f..f57bc01 100644
--- a/src/SystemClock.cpp
+++ b/src/SystemClock.cpp
@@ -171,6 +171,8 @@ void SystemClock::updateRtc()
     );
 }
 
+#endif // IOT_SYSTEM_CLOCK_HW_RTC
+
 void SystemClock::sychronizeCLibClock()
 {
     _log.info("synchronizing clock of C Runtime Library");
@@ -188,8 +190,6 @@ void SystemClock::sychronizeCLibClock()
     _log.debug("result of time(): %ld", time(nullptr));
 }
 
-#endif // IOT_SYSTEM_CLOCK_HW_RTC
-
 bool SystemClock::isDst(const std::time_t t)
 {
     const auto tm = gmtime(&t);