diff --git a/src/build123d/topology.py b/src/build123d/topology.py
index 5ae9cc2b..d2ce2acf 100644
--- a/src/build123d/topology.py
+++ b/src/build123d/topology.py
@@ -1988,7 +1988,7 @@ def is_valid(self) -> bool:
         chk.SetParallel(True)
         return chk.IsValid()
 
-    def bounding_box(self, tolerance: float = None) -> BoundBox:
+    def bounding_box(self, tolerance: float = None, optimal: bool = True) -> BoundBox:
         """Create a bounding box for this Shape.
 
         Args:
@@ -1997,7 +1997,7 @@ def bounding_box(self, tolerance: float = None) -> BoundBox:
         Returns:
             BoundBox: A box sized to contain this Shape
         """
-        return BoundBox._from_topo_ds(self.wrapped, tolerance=tolerance)
+        return BoundBox._from_topo_ds(self.wrapped, tolerance=tolerance, optimal=optimal)
 
     def mirror(self, mirror_plane: Plane = None) -> Self:
         """