diff --git a/src/CAD_to_OpenMC/assemblymesher_gmsh.py b/src/CAD_to_OpenMC/assemblymesher_gmsh.py
index 0f71a98..0bfd3fd 100644
--- a/src/CAD_to_OpenMC/assemblymesher_gmsh.py
+++ b/src/CAD_to_OpenMC/assemblymesher_gmsh.py
@@ -20,8 +20,9 @@ def __init__(self, min_mesh_size, max_mesh_size, curve_samples, default, mesh_al
     self.refine=refine
     self._gmsh_init()
     self._cq_solids_to_gmsh()
-  #def __del__(self):
-  #  gmsh.finalize()
+
+  def __del__(self):
+    gmsh.finalize()
 
   def _gmsh_init(self):
       if not gmsh.isInitialized():