diff --git a/plat/mediatek/mt8516/drivers/rtc/rtc.c b/plat/mediatek/mt8516/drivers/rtc/rtc.c
index 450f951..cdae4e2 100644
--- a/plat/mediatek/mt8516/drivers/rtc/rtc.c
+++ b/plat/mediatek/mt8516/drivers/rtc/rtc.c
@@ -70,7 +70,7 @@
 	uint16_t bbpu;
 
 	/* pull PWRBB low */
-	bbpu = RTC_BBPU_KEY | RTC_BBPU_AUTO | RTC_BBPU_PWREN;
+	bbpu = RTC_BBPU_KEY;
 	if (Writeif_unlock()) {
 		RTC_Write(RTC_BBPU, bbpu);
 		if (!Write_trigger())