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-rw-r--r--src/include/rtc.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/include/rtc.h b/src/include/rtc.h
index 0a380745d3..6d562f76b0 100644
--- a/src/include/rtc.h
+++ b/src/include/rtc.h
@@ -21,5 +21,6 @@ int rtc_get(struct rtc_time *time);
int rtc_to_tm(int tim, struct rtc_time *tm);
unsigned long rtc_mktime(const struct rtc_time *tm);
void rtc_display(const struct rtc_time *tm);
+int rtc_invalid(const struct rtc_time *tm);
#endif /* _RTC_H_ */