diff --git a/docs/lib-path_extrude.md b/docs/lib-path_extrude.md
index 5ba69a9e..d1061cd1 100644
--- a/docs/lib-path_extrude.md
+++ b/docs/lib-path_extrude.md
@@ -13,6 +13,7 @@ When using this module, you should use points to represent the 2D shape. You nee
 - `triangles` : `"RADIAL"` (default), `"HOLLOW"` or user-defined indexes. See example below.
 - `twist` : The number of degrees of through which the shape is extruded.
 - `scale` : Scales the 2D shape by this value over the length of the extrusion. Scale can be a scalar or a vector.
+- `round_robin` : If the first point and the last point of `path_pts` has the same coordinate, setting `round_robin` to `true` will connect them automatically.
 
 ## Examples