diff --git a/ArduPlane/quadplane.cpp b/ArduPlane/quadplane.cpp
index 0212e9b7878..1136b9c97f3 100644
--- a/ArduPlane/quadplane.cpp
+++ b/ArduPlane/quadplane.cpp
@@ -112,7 +112,7 @@ const AP_Param::GroupInfo QuadPlane::var_info[] = {
 
     // @Param: YAW_RATE_MAX
     // @DisplayName: Maximum yaw rate
-    // @Description: This is the maximum yaw rate for pilot input on rudder stick in degrees/second
+    // @Description: This is the maximum yaw rate for pilot input on rudder stick in degrees/second and weathervaning is limited to half of this value
     // @Units: deg/s
     // @Range: 50 500
     // @Increment: 1