diff --git a/ROMFS/px4fmu_common/init.d/airframes/4019_x500_v2 b/ROMFS/px4fmu_common/init.d/airframes/4019_x500_v2
index 69ddd7a025..1fb639236e 100644
--- a/ROMFS/px4fmu_common/init.d/airframes/4019_x500_v2
+++ b/ROMFS/px4fmu_common/init.d/airframes/4019_x500_v2
@@ -33,3 +33,10 @@ param set-default CA_ROTOR2_KM -0.05
 param set-default CA_ROTOR3_PX -0.25
 param set-default CA_ROTOR3_PY 0.25
 param set-default CA_ROTOR3_KM -0.05
+
+param set-default PWM_AUX_FUNC1 101
+param set-default PWM_AUX_FUNC2 102
+param set-default PWM_AUX_FUNC3 103
+param set-default PWM_AUX_FUNC4 104
+param set-default PWM_AUX_TIM0 -4
+