diff --git a/ROMFS/px4fmu_common/init.d/airframes/4019_x500_v2 b/ROMFS/px4fmu_common/init.d/airframes/4019_x500_v2
index 4b56f8ae3a..e4812cc1c7 100644
--- a/ROMFS/px4fmu_common/init.d/airframes/4019_x500_v2
+++ b/ROMFS/px4fmu_common/init.d/airframes/4019_x500_v2
@@ -22,11 +22,6 @@ param set-default MC_PITCHRATE_I 0.3
 param set-default MC_ROLLRATE_D 0.004
 param set-default MC_PITCHRATE_D 0.004
 
-param set-default PWM_MAIN_FUNC1 101
-param set-default PWM_MAIN_FUNC2 102
-param set-default PWM_MAIN_FUNC3 103
-param set-default PWM_MAIN_FUNC4 104
-
 # Square quadrotor X PX4 numbering
 param set-default CA_ROTOR_COUNT 4
 param set-default CA_ROTOR0_PX 1