diff --git a/source/common/rtc.c b/source/common/rtc.c
index 4b726b3..ecc3911 100644
--- a/source/common/rtc.c
+++ b/source/common/rtc.c
@@ -28,13 +28,13 @@ bool is_valid_dstime(DsTime* dstime) {
 }
 
 bool get_dstime(DsTime* dstime) {
-    return (I2C_readRegBuf(I2C_DEV_MCU, 0x30, (void*) dstime, 7));
+    return (I2C_readRegBuf(I2C_DEV_MCU, 0x30, (void*) dstime, sizeof(DsTime)));
 }
 
 bool set_dstime(DsTime* dstime) {
     if (!is_valid_dstime(dstime)) return false;
-    for (u32 i = 0; i < 7; i++) {
-        if (i == 3) continue; // skip the unknown byte
+    for (u32 i = 0; i < sizeof(DsTime); i++) {
+        if ((i == 3) || (i == 7)) continue; // skip the unused bytes
         if (!I2C_writeReg(I2C_DEV_MCU, 0x30+i, ((u8*)dstime)[i]))
             return false;
     }
diff --git a/source/common/rtc.h b/source/common/rtc.h
index 140f9ed..39829e8 100644
--- a/source/common/rtc.h
+++ b/source/common/rtc.h
@@ -12,10 +12,11 @@ typedef struct {
     u8 bcd_s;
     u8 bcd_m;
     u8 bcd_h;
-    u8 unknown;
+    u8 weekday;
     u8 bcd_D;
     u8 bcd_M;
     u8 bcd_Y;
+	u8 leap_count;
 } __attribute__((packed)) DsTime;
 
 bool is_valid_dstime(DsTime* dstime);