diff --git a/libraries/RC_Channel/RC_Channel.cpp b/libraries/RC_Channel/RC_Channel.cpp
index 13ee536603..f1083686e3 100644
--- a/libraries/RC_Channel/RC_Channel.cpp
+++ b/libraries/RC_Channel/RC_Channel.cpp
@@ -54,7 +54,7 @@ const AP_Param::GroupInfo RC_Channel::var_info[] PROGMEM = {
 
 	// @Param: REV
 	// @DisplayName: RC reverse
-	// @Description: Reverse servo operation. Ignored unless did switches are disabled.
+	// @Description: Reverse servo operation. Ignored on APM1 unless dip-switches are disabled.
 	// @Values: -1:Reversed,1:Normal
 	// @User: Advanced
 	AP_GROUPINFO("REV",  3, RC_Channel, _reverse),