1 files changed, 2 insertions, 0 deletions

diff --git a/firmware/include/timefuncs.h b/firmware/include/timefuncs.h
index d2f42eb9ff..e266ff9acb 100644
--- a/firmware/include/timefuncs.h
+++ b/firmware/include/timefuncs.h
@@ -27,6 +27,8 @@
 struct tm *get_time(void);
 int set_time(const struct tm *tm);
 bool valid_time(const struct tm *tm);
+#if CONFIG_RTC
 time_t mktime(struct tm *t);
+#endif
 
 #endif /* _TIMEFUNCS_H_ */