diff --git a/drivers/rtc/rtc-efi.c b/drivers/rtc/rtc-efi.c
index 53b589d..d30fb65 100644
--- a/drivers/rtc/rtc-efi.c
+++ b/drivers/rtc/rtc-efi.c
@@ -218,6 +218,7 @@
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
 
+	rtc->uie_unsupported = 1;
 	platform_set_drvdata(dev, rtc);
 
 	return 0;