diff --git a/ROMFS/px4fmu_common/init.d/4020_hk_micro_pcb b/ROMFS/px4fmu_common/init.d/4020_hk_micro_pcb
index 5bd67a9e41..99ffd73a5f 100644
--- a/ROMFS/px4fmu_common/init.d/4020_hk_micro_pcb
+++ b/ROMFS/px4fmu_common/init.d/4020_hk_micro_pcb
@@ -26,4 +26,3 @@ then
 fi
 
 set PWM_MIN 1200
-set PWM_DISARMED 900