diff --git a/meshkernel/meshkernel.py b/meshkernel/meshkernel.py
index e89bee75..77f13c4c 100644
--- a/meshkernel/meshkernel.py
+++ b/meshkernel/meshkernel.py
@@ -286,7 +286,8 @@ def mesh2d_get_mesh_inner_boundaries_as_polygons(self) -> GeometryList:
         """Gets the inner boundary polygons from the MeshKernel.
 
         Returns:
-            Mesh2d: A copy of the inner boundary polygons.
+            Mesh2d: A sequence of points describing the inner boundary polygons.
+            Any multiple boundaries will be separated by a separator value (-999).
         """
 
         c_geometry_list_dimension = c_int()