diff -r f068c3e7743d Lib/gzip.py
--- a/Lib/gzip.py	Thu Nov 08 17:29:02 2012 +0200
+++ b/Lib/gzip.py	Thu Nov 08 16:53:19 2012 +0000
@@ -421,7 +421,7 @@
             if offset < self.offset:
                 raise IOError('Negative seek in write mode')
             count = offset - self.offset
-            for i in range(count // 1024):
+            for i in xrange(count // 1024):
                 self.write(1024 * '\0')
             self.write((count % 1024) * '\0')
         elif self.mode == READ:
@@ -429,7 +429,7 @@
                 # for negative seek, rewind and do positive seek
                 self.rewind()
             count = offset - self.offset
-            for i in range(count // 1024):
+            for i in xrange(count // 1024):
                 self.read(1024)
             self.read(count % 1024)