diff --git a/lib/geo/polygonz.ex b/lib/geo/polygonz.ex
index 4bae861..08c7d57 100644
--- a/lib/geo/polygonz.ex
+++ b/lib/geo/polygonz.ex
@@ -1,6 +1,6 @@
 defmodule Geo.PolygonZ do
   @moduledoc """
-  Defines the Polygon struct.
+  Defines the PolygonZ struct.
   """
 
   @type t :: %__MODULE__{