diff --git a/src/drivers/px4fmu/px4fmu_params.c b/src/drivers/px4fmu/px4fmu_params.c
index 202a99349b..5eac095eea 100644
--- a/src/drivers/px4fmu/px4fmu_params.c
+++ b/src/drivers/px4fmu/px4fmu_params.c
@@ -1,6 +1,6 @@
 /****************************************************************************
  *
- *   Copyright (c) 2015 PX4 Development Team. All rights reserved.
+ *   Copyright (c) 2015-2018 PX4 Development Team. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -34,9 +34,8 @@
 /**
  * Invert direction of aux output channel 1
  *
- * Set to 1 to invert the channel, 0 for default direction.
+ * Enable to invert the channel.
  *
- * @reboot_required true
  * @boolean
  * @group PWM Outputs
  */
@@ -45,9 +44,8 @@ PARAM_DEFINE_INT32(PWM_AUX_REV1, 0);
 /**
  * Invert direction of aux output channel 2
  *
- * Set to 1 to invert the channel, 0 for default direction.
+ * Enable to invert the channel.
  *
- * @reboot_required true
  * @boolean
  * @group PWM Outputs
  */
@@ -56,9 +54,8 @@ PARAM_DEFINE_INT32(PWM_AUX_REV2, 0);
 /**
  * Invert direction of aux output channel 3
  *
- * Set to 1 to invert the channel, 0 for default direction.
+ * Enable to invert the channel.
  *
- * @reboot_required true
  * @boolean
  * @group PWM Outputs
  */
@@ -67,9 +64,8 @@ PARAM_DEFINE_INT32(PWM_AUX_REV3, 0);
 /**
  * Invert direction of aux output channel 4
  *
- * Set to 1 to invert the channel, 0 for default direction.
+ * Enable to invert the channel.
  *
- * @reboot_required true
  * @boolean
  * @group PWM Outputs
  */
@@ -78,9 +74,8 @@ PARAM_DEFINE_INT32(PWM_AUX_REV4, 0);
 /**
  * Invert direction of aux output channel 5
  *
- * Set to 1 to invert the channel, 0 for default direction.
+ * Enable to invert the channel.
  *
- * @reboot_required true
  * @boolean
  * @group PWM Outputs
  */
@@ -89,9 +84,8 @@ PARAM_DEFINE_INT32(PWM_AUX_REV5, 0);
 /**
  * Invert direction of aux output channel 6
  *
- * Set to 1 to invert the channel, 0 for default direction.
+ * Enable to invert the channel.
  *
- * @reboot_required true
  * @boolean
  * @group PWM Outputs
  */