diff --git a/br-ext-chip-hisilicon/board/hi3516cv300/hi3516cv300.generic.config b/br-ext-chip-hisilicon/board/hi3516cv300/hi3516cv300.generic.config
index 3c77419458..f173e11610 100644
--- a/br-ext-chip-hisilicon/board/hi3516cv300/hi3516cv300.generic.config
+++ b/br-ext-chip-hisilicon/board/hi3516cv300/hi3516cv300.generic.config
@@ -1839,7 +1839,17 @@ CONFIG_DETECT_CARD_TIME=200
 # CONFIG_ACCESSIBILITY is not set
 # CONFIG_EDAC is not set
 CONFIG_RTC_LIB=y
-# CONFIG_RTC_CLASS is not set
+# The SoC RTC at 0x12090000, as /dev/rtc0 for hwclock, hctosys and
+# fake-hwclock (#191). The SDK's hi3516cv300_rtc.ko is no substitute: it
+# offers only private HI_RTC_* ioctls, so hwclock's RTC_RD_TIME fails on it.
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_HCTOSYS=y
+CONFIG_RTC_SYSTOHC=y
+CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
+CONFIG_RTC_INTF_SYSFS=y
+CONFIG_RTC_INTF_PROC=y
+CONFIG_RTC_INTF_DEV=y
+CONFIG_RTC_DRV_HIBVT=y
 # CONFIG_DMADEVICES is not set
 # CONFIG_AUXDISPLAY is not set
 # CONFIG_UIO is not set