diff -r 316593f5bf73 Doc/library/mmap.rst
--- a/Doc/library/mmap.rst	Mon Apr 25 08:18:07 2016 -0700
+++ b/Doc/library/mmap.rst	Fri Apr 29 01:33:03 2016 +0800
@@ -127,7 +127,7 @@
       import mmap
 
       with mmap.mmap(-1, 13) as mm:
-          mm.write("Hello world!")
+          mm.write(b"Hello world!")
 
    .. versionadded:: 3.2
       Context manager support.