1 files changed, 2 insertions, 2 deletions

diff --git a/firmware/include/timefuncs.h b/firmware/include/timefuncs.h
index 5c6719e709..03bb06fb9c 100644
--- a/firmware/include/timefuncs.h
+++ b/firmware/include/timefuncs.h
@@ -25,7 +25,7 @@
 #include "time.h"
 
 struct tm *get_time(void);
-int set_time(struct tm *tm);
-bool valid_time(struct tm *tm);
+int set_time(const struct tm *tm);
+bool valid_time(const struct tm *tm);
 
 #endif /* _TIMEFUNCS_H_ */