diff --git a/boxes/__init__.py b/boxes/__init__.py
index a7a767c9..382742bf 100755
--- a/boxes/__init__.py
+++ b/boxes/__init__.py
@@ -581,6 +581,8 @@ def addParts(self, parts):
         for part in parts:
             self.addPart(part)
 
+    fingerHolesAt : Any
+
     def _buildObjects(self):
         """Add default edges and parts"""
         self.edges = {}