diff --git a/cspsubdiv.py b/cspsubdiv.py
index a8883df..75010fd 100755
--- a/cspsubdiv.py
+++ b/cspsubdiv.py
@@ -1,8 +1,9 @@
 #!/usr/bin/env python  
-from bezmisc import *  
-from ffgeom import *  
+from bezmisc import *
+from ffgeom import *
   
-def maxdist(((p0x,p0y),(p1x,p1y),(p2x,p2y),(p3x,p3y))):  
+def maxdist(xxx_todo_changeme):  
+    ((p0x,p0y),(p1x,p1y),(p2x,p2y),(p3x,p3y)) = xxx_todo_changeme
     p0 = Point(p0x,p0y)  
     p1 = Point(p1x,p1y)  
     p2 = Point(p2x,p2y)