diff --git a/ArduPlane/Parameters.cpp b/ArduPlane/Parameters.cpp
index 8dcd235220..bc444f6b84 100644
--- a/ArduPlane/Parameters.cpp
+++ b/ArduPlane/Parameters.cpp
@@ -273,7 +273,7 @@ const AP_Param::Info Plane::var_info[] = {
 
     // @Param: WP_LOITER_RAD
     // @DisplayName: Waypoint Loiter Radius
-    // @Description: Defines the distance from the waypoint center, the plane will maintain during a loiter. If you set this value to a negative number then the default loiter direction will be counter-clockwise instead of clockwise.
+    // @Description: Defines the distance from the waypoint center, the plane will maintain during a loiter. If you set this value to a negative number then the default loiter direction will be counter-clockwise instead of clockwise. If this value is too close to zero, the achieved loiter radius will be driven by ROLL_LIMIT_DEG.
     // @Units: m
     // @Range: -32767 32767
     // @Increment: 1