diff --git a/src/blenderbim/blenderbim/core/tool.py b/src/blenderbim/blenderbim/core/tool.py
index f662439b9b..9b386a59f4 100644
--- a/src/blenderbim/blenderbim/core/tool.py
+++ b/src/blenderbim/blenderbim/core/tool.py
@@ -78,6 +78,7 @@ def get_selected_objects(cls): pass
 def set_active_object(cls, obj): pass
 def apply_bmesh(cls, mesh, bm): pass
 def get_bmesh_for_mesh(cls, mesh, clean=False): pass
+def get_viewport_context(cls): pass
 
 
 @interface