diff --git a/src/modules/rc_update/params.c b/src/modules/rc_update/params.c
index ed14dea538..3a5f41246d 100644
--- a/src/modules/rc_update/params.c
+++ b/src/modules/rc_update/params.c
@@ -1202,13 +1202,12 @@ PARAM_DEFINE_INT32(RC_MAP_PITCH, 0);
 /**
  * Failsafe channel mapping.
  *
- * Configures which channel is used by the receiver to indicate the signal was lost.
- * Futaba receivers do report that way.
- * If 0, whichever channel is mapped to throttle is used
- * otherwise the value indicates the specific RC channel to use
+ * Configures which RC channel is used by the receiver to indicate the signal was lost
+ * (on receivers that use output a fixed signal value to report lost signal).
+ * If set to 0, the channel mapped to throttle is used.
  *
  * Use RC_FAILS_THR to set the threshold indicating lost signal. By default it's below
- * the expected range and hence diabled.
+ * the expected range and hence disabled.
  *
  * @min 0
  * @max 18
@@ -1971,11 +1970,13 @@ PARAM_DEFINE_INT32(RC_MAP_PARAM3, 0);
 /**
  * Failsafe channel PWM threshold.
  *
- * Set to a value slightly above the PWM value assumed by throttle in a failsafe event,
- * but ensure it is below the PWM value assumed by throttle during normal operation.
+ * Use RC_MAP_FAILSAFE to specify which channel is used to indicate RC loss via this theshold.
+ * By default this is the throttle channel.
  *
- * Use RC_MAP_FAILSAFE to specify which channel is used to check.
- * Note: The default value of 0 is below the epxed range and hence disables the feature.
+ * Set to a PWM value slightly above the PWM value for the channel (e.g. throttle) in a failsafe event,
+ * but below the minimum PWM value for the channel during normal operation.
+ *
+ * Note: The default value of 0 disables the feature (it is below the expected range).
  *
  * @min 0
  * @max 2200