diff --git a/src/geouned/GEOUNED/void/void_box_class.py b/src/geouned/GEOUNED/void/void_box_class.py
index bc9a55af..45a78f7b 100644
--- a/src/geouned/GEOUNED/void/void_box_class.py
+++ b/src/geouned/GEOUNED/void/void_box_class.py
@@ -23,7 +23,7 @@ def __init__(self, MetaSolids, Enclosure):
             self.BoundBox = Enclosure
             self.PieceEnclosure = None
         else:
-            self.BoundBox = Enclosure.BoundBox
+            self.BoundBox = Enclosure.optimalBoundingBox()
             self.PieceEnclosure = Enclosure
 
         for m in MetaSolids: