diff --git a/src/geouned/GEOUNED/conversion/cell_definition.py b/src/geouned/GEOUNED/conversion/cell_definition.py
index 10b07d20..2ecc73cd 100644
--- a/src/geouned/GEOUNED/conversion/cell_definition.py
+++ b/src/geouned/GEOUNED/conversion/cell_definition.py
@@ -515,7 +515,7 @@ def cellDef(meta_obj, surfaces, universe_box, options, tolerances, numeric_forma
     del_list = []
 
     piece_def = BoolSequence(operator="OR")
-    iece_obj = []
+    piece_obj = []
     cones = set()
     for isol, solid in enumerate(solids):
         surf_piece = []
@@ -762,14 +762,14 @@ def cellDef(meta_obj, surfaces, universe_box, options, tolerances, numeric_forma
 
         if surf_piece_bool.elements:
             piece_def.append(surf_piece_bool)
-            iece_obj.append(surf_obj)
+            piece_obj.append(surf_obj)
         else:
             del_list.append(isol)
 
     for isol in reversed(del_list):
         del meta_obj.Solids[isol]
     meta_obj.set_definition(piece_def)
-    meta_obj.set_faces(iece_obj)
+    meta_obj.set_faces(piece_obj)
     return tuple(cones)