diff --git a/meshkernel/py_structures.py b/meshkernel/py_structures.py
index 3ca9323b..725ebcce 100644
--- a/meshkernel/py_structures.py
+++ b/meshkernel/py_structures.py
@@ -67,6 +67,7 @@ class Mesh2dProperty(IntEnum):
     FACE_CIRCUMCENTER = 2
     NETLINK_CONTOUR_POLYGON = 3
     FACE_BOUNDS = 4
+    SMOOTHNESS = 5
 
 
 @unique