diff --git a/libraries/AP_HAL_ChibiOS/hwdef/omnibusf4pro-bdshot/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/omnibusf4pro-bdshot/hwdef.dat
index d4b4d1a6d2..acaaf00f87 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/omnibusf4pro-bdshot/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/omnibusf4pro-bdshot/hwdef.dat
@@ -3,8 +3,10 @@
 
 include ../omnibusf4pro/hwdef.dat
 
-undef PB0 PB1 PA3 PB4
+undef PB0 PB1 PA3 PB4 PA2 PA1
 
 PB0 TIM3_CH3  TIM3 PWM(1) GPIO(50)
 PB1 TIM3_CH4  TIM3 PWM(2) GPIO(51) BIDIR
 PA3 TIM2_CH4  TIM2 PWM(3) GPIO(52) BIDIR
+PA2 TIM2_CH3  TIM2 PWM(4) GPIO(53)
+# PWM 5 is disabled as it shares a timer with PWM 3&4