diff --git a/skimage/measure/find_contours.py b/skimage/measure/find_contours.py
index 68e471ac..298c09de 100755
--- a/skimage/measure/find_contours.py
+++ b/skimage/measure/find_contours.py
@@ -126,8 +126,8 @@ def find_contours(array, level,
 def _take_2(seq):
     iterator = iter(seq)
     while(True):
-        n1 = iterator.next()
-        n2 = iterator.next()
+        n1 = next(iterator)
+        n2 = next(iterator)
         yield (n1, n2)