diff --git a/sfc/slicer.py b/sfc/slicer.py
index 7906e0f..3857ff9 100755
--- a/sfc/slicer.py
+++ b/sfc/slicer.py
@@ -83,7 +83,7 @@ def dump_level(wires, z):
 				first = v
 			if last is None or dist(v, last) >= mech_eps:
 				print_vec(v, z)
-			last = v
+				last = v
 		if first is not None:
 			print_vec(first, z)
 			print