diff --git a/invesalius/control.py b/invesalius/control.py
index bb759dd..ef53aef 100755
--- a/invesalius/control.py
+++ b/invesalius/control.py
@@ -76,8 +76,8 @@ class Controller():
             proj.SetAcquisitionModality(acquisition_modality)
             proj.imagedata = imagedata
             proj.original_orientation = orientation
-            proj.window = const.WINDOW_LEVEL['Bone'][0]
-            proj.level = const.WINDOW_LEVEL['Bone'][1]
+            proj.window = window = const.WINDOW_LEVEL['Bone'][0]
+            proj.level = level = const.WINDOW_LEVEL['Bone'][1]
 
         if not imagedata:
             print "Sorry, but there are no medical images supported on this dir."
--
libgit2 0.21.2