diff --git a/src/blenderbim/blenderbim/bim/module/model/window.py b/src/blenderbim/blenderbim/bim/module/model/window.py
index f0e4b3514c..2973ae0685 100644
--- a/src/blenderbim/blenderbim/bim/module/model/window.py
+++ b/src/blenderbim/blenderbim/bim/module/model/window.py
@@ -22,6 +22,7 @@ import json
 import bmesh
 import collections
 import ifcopenshell
+import blenderbim
 import blenderbim.tool as tool
 import blenderbim.core.geometry as core
 from ifcopenshell.api.geometry.add_window_representation import DEFAULT_PANEL_SCHEMAS