diff --git a/boxes/generators/ottosoles.py b/boxes/generators/ottosoles.py
index 14b7324..e797803 100644
--- a/boxes/generators/ottosoles.py
+++ b/boxes/generators/ottosoles.py
@@ -52,12 +52,15 @@ class OttoSoles(Boxes):
 
         for i in range(self.num*2):
             if c2 >= 2 * d:
-                self.polyline(c2, 45, y-2*c, 45, c2/2., 90, w, 90, c2/2-d, -45,
-                              y-2*c-2*d, -45, c2-2*d, -45, x-2*c-2*d, -45,
-                              c2/2-d, 90, w, 90, c2/2., 45, x-2*c, 45)
+                self.polyline((c2, 1), 45, (y-2*c, 1), 45, c2/2., 90, (w, 1),
+                              90, c2/2-d, -45, (y-2*c-2*d, 1), -45,
+                              (c2-2*d, 1), -45,
+                              (x-2*c-2*d, 1), -45, c2/2-d, 90, (w, 1), 90,
+                              c2/2., 45, (x-2*c, 1), 45)
                 self.moveTo(0, w + c2/2. + 2*2**0.5*self.burn)
             else:
-                self.polyline(c2, 45, y-2*c, 45, c2/2., 90, w2, 45,
-                              y-2*w, -90, x-2*w, 45, w2, 90, c2/2., 45, x-2*c, 45)
+                self.polyline((c2, 1), 45, (y-2*c, 1), 45, c2/2., 90, (w2, 1),
+                              45, (y-2*w, 1), -90, (x-2*w, 1), 45, (w2, 1), 90,
+                              c2/2., 45, (x-2*c, 3), 45)
                 self.moveTo(0, w * 2**0.5 + 2*2**0.5*self.burn)
         self.close()