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-rw-r--r--src/lib/rtc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/lib/rtc.c b/src/lib/rtc.c
index 5e03cfae1e..c5fffa0e8b 100644
--- a/src/lib/rtc.c
+++ b/src/lib/rtc.c
@@ -11,7 +11,7 @@
#define STARTOFTIME 1970
#define SECDAY 86400L
#define SECYR (SECDAY * 365)
-#define LEAP_YEAR(year) ((year) % 4 == 0)
+#define LEAP_YEAR(year) (((year) % 4 == 0 && (year) % 100 != 0) || (year) % 400 == 0)
#define DAYS_IN_YEAR(a) (LEAP_YEAR(a) ? 366 : 365)
#define DAYS_IN_MONTH(a) (month_days[(a) - 1])