diff --git a/libraries/AP_HAL_ChibiOS/hwdef/BeastH7/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/BeastH7/hwdef.dat
index a41589b248..5c5b2ca609 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/BeastH7/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/BeastH7/hwdef.dat
@@ -12,7 +12,6 @@ APJ_BOARD_ID 1025
 OSCILLATOR_HZ 8000000
 
 FLASH_SIZE_KB 2048
-env OPTIMIZE -O2
 
 # bootloader takes first sector
 FLASH_RESERVE_START_KB 128
@@ -103,7 +102,7 @@ PD12 TIM4_CH1 TIM4 PWM(5) GPIO(54)
 PC13 LED0 OUTPUT LOW GPIO(90) # Blue LED
 
 DMA_PRIORITY TIM1* TIM3*
-DMA_NOSHARE SPI1_RX SPI3_TX TIM1* TIM3* TIM4_UP USART1_TX
+DMA_NOSHARE SPI1* SPI3* TIM1* TIM3* TIM4_UP USART1_TX
 
 define HAL_STORAGE_SIZE 16384
 # use last 2 pages for flash storage