diff --git a/include/linux/mfd/rohm-bd70528.h b/include/linux/mfd/rohm-bd70528.h
index 2ad2320d0a96..edae6f7afd8e 100644
--- a/include/linux/mfd/rohm-bd70528.h
+++ b/include/linux/mfd/rohm-bd70528.h
@@ -311,7 +311,7 @@ enum {
 #define BD70528_MASK_RTC_MINUTE		0x7f
 #define BD70528_MASK_RTC_HOUR_24H	0x80
 #define BD70528_MASK_RTC_HOUR_PM	0x20
-#define BD70528_MASK_RTC_HOUR		0x1f
+#define BD70528_MASK_RTC_HOUR		0x3f
 #define BD70528_MASK_RTC_DAY		0x3f
 #define BD70528_MASK_RTC_WEEK		0x07
 #define BD70528_MASK_RTC_MONTH		0x1f