diff --git a/libraries/AP_HAL_ChibiOS/hwdef/Pixhawk4Pro/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/Pixhawk4Pro/hwdef.dat
index 83cd8c4b49..0dc44d2b7f 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/Pixhawk4Pro/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/Pixhawk4Pro/hwdef.dat
@@ -173,8 +173,8 @@ PD13 TIM4_CH2 TIM4 PWM(5) GPIO(54)
 PD14 TIM4_CH3 TIM4 PWM(6) GPIO(55)
 # we need to disable DMA on the last 2 FMU channels
 # as timer 12 doesn't have a TIMn_UP DMA option
-PH6  TIM12_CH1 TIM12 PWM(7) GPIO(56)
-PH9  TIM12_CH2 TIM12 PWM(8) GPIO(57)
+PH6  TIM12_CH1 TIM12 PWM(7) GPIO(56) NODMA
+PH9  TIM12_CH2 TIM12 PWM(8) GPIO(57) NODMA
 
 define BOARD_PWM_COUNT_DEFAULT 8