2to3 --fix=xrange
diff --git a/Lib/fontTools/ttLib/sfnt.py b/Lib/fontTools/ttLib/sfnt.py
index 035e51a..112b827 100644
--- a/Lib/fontTools/ttLib/sfnt.py
+++ b/Lib/fontTools/ttLib/sfnt.py
@@ -463,7 +463,7 @@
 	value = 0
 	blockSize = 4096
 	assert blockSize % 4 == 0
-	for i in xrange(0, len(data), blockSize):
+	for i in range(0, len(data), blockSize):
 		block = data[i:i+blockSize]
 		longs = struct.unpack(">%dL" % (len(block) // 4), block)
 		value = (value + sum(longs)) & 0xffffffff