1 files changed, 1 insertions, 1 deletions
diff --git a/include/rtc.h b/include/rtc.h
index fdc5ad709..5ee6a5316 100644
--- a/include/rtc.h
+++ b/include/rtc.h
@@ -22,7 +22,7 @@ extern struct Time gLocalTime;
 void RtcDisableInterrupts(void);
 void RtcRestoreInterrupts(void);
 u32 ConvertBcdToBinary(u8 bcd);
-bool8 IsLeapYear(u8 year);
+bool8 IsLeapYear(u32 year);
 u16 ConvertDateToDayCount(u8 year, u8 month, u8 day);
 u16 RtcGetDayCount(struct SiiRtcInfo *rtc);
 void RtcInit(void);