diff --git a/libraries/AP_HAL_ChibiOS/hwdef/DevEBoxH7v2/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/DevEBoxH7v2/hwdef.dat
index 175d3b6c68..2a8bc1d34a 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/DevEBoxH7v2/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/DevEBoxH7v2/hwdef.dat
@@ -16,8 +16,6 @@ STM32_ST_USE_TIMER 2
 # reserve 256 bytes for comms between app and bootloader
 RAM_RESERVE_START 256
 
-define NO_DATAFLASH TRUE
-
 FLASH_SIZE_KB 128
 FLASH_RESERVE_START_KB 0
 
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/Sierra-F405/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/Sierra-F405/hwdef.dat
index dfd4ffa397..54276ecb86 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/Sierra-F405/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/Sierra-F405/hwdef.dat
@@ -34,7 +34,6 @@ define HAL_NO_GPIO_IRQ
 define HAL_NO_RCIN_THREAD
 
 define HAL_USE_RTC FALSE
-define NO_DATAFLASH TRUE
 
 define DMA_RESERVE_SIZE 0