diff --git a/libraries/AP_HAL_ChibiOS/hwdef/HerePro/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/HerePro/hwdef.dat
index 49c88fe3f9..0c8c2b46a8 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/HerePro/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/HerePro/hwdef.dat
@@ -64,6 +64,7 @@ FLASH_RESERVE_START_KB 256
 define GPS_UBLOX_MOVING_BASELINE TRUE
 define HAL_GCS_ENABLED 1
 define HAL_LOGGING_ENABLED TRUE
+define HAL_PERIPH_ENABLE_RTC 1
 define HAL_NO_MONITOR_THREAD
 
 
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/Sierra-F9P/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/Sierra-F9P/hwdef.dat
index 295bde2ced..e8096fd5c1 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/Sierra-F9P/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/Sierra-F9P/hwdef.dat
@@ -131,6 +131,7 @@ define GPS_MOVING_BASELINE 1
 
 # Logging
 define HAL_LOGGING_ENABLED 1
+define HAL_PERIPH_ENABLE_RTC 1
 define HAL_OS_FATFS_IO 1
 
 # SD Card pins
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/Sierra-PrecisionPoint/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/Sierra-PrecisionPoint/hwdef.dat
index 1a6c3ea56a..70fe852ca5 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/Sierra-PrecisionPoint/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/Sierra-PrecisionPoint/hwdef.dat
@@ -125,6 +125,7 @@ define GPS_MAX_RATE_MS 200
 
 # Logging
 define HAL_LOGGING_ENABLED 1
+define HAL_PERIPH_ENABLE_RTC 1
 define HAL_OS_FATFS_IO 1
 
 # SD Card pins