diff --git a/libraries/AP_HAL_ChibiOS/hwdef/sparky2/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/sparky2/hwdef.dat
index 72026e8417..f934a9de78 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/sparky2/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/sparky2/hwdef.dat
@@ -115,8 +115,6 @@ PB14 TIM1_CH2N TIM1 PWM(7) GPIO(35)
 define HAL_STORAGE_SIZE 15360
 define STORAGE_FLASH_PAGE 1
 
-FLASH_SIZE_KB 1024
-
 # reserve 16k for bootloader and 32k for flash storage
 FLASH_RESERVE_START_KB 64
 
@@ -144,3 +142,6 @@ define CONFIG_HAL_BOARD_SUBTYPE HAL_BOARD_SUBTYPE_CHIBIOS_SPARKY2
 define STM32_PWM_USE_ADVANCED TRUE
 
 define BOARD_PWM_COUNT_DEFAULT 7
+
+# we are low on flash on this board
+define HAL_MINIMIZE_FEATURES 1