diff --git a/boxes/edges.py b/boxes/edges.py
index 28bbff6..7bf8e96 100644
--- a/boxes/edges.py
+++ b/boxes/edges.py
@@ -387,7 +387,7 @@ class FingerJointEdgeCounterPart(FingerJointEdge):
     description = "Finger Joint (opposing side)"
     positive = False
 
-    def width(self):
+    def startwidth(self):
         """ """
         return self.boxes.thickness