diff -r 6d278f426417 Doc/using/cmdline.rst
--- a/Doc/using/cmdline.rst	Fri Jul 05 18:05:29 2013 -1000
+++ b/Doc/using/cmdline.rst	Sat Jul 06 12:15:21 2013 +0300
@@ -274,8 +274,8 @@
 
 .. cmdoption:: -u
 
-   Force the binary layer of the stdin, stdout and stderr streams (which is
-   available as their ``buffer`` attribute) to be unbuffered.  The text I/O
+   Force the binary layer of the stdout and stderr streams (which is
+   available as their ``buffer`` attribute) to be unbuffered. The text I/O
    layer will still be line-buffered if writing to the console, or
    block-buffered if redirected to a non-interactive file.
 
diff -r 6d278f426417 Misc/python.man
--- a/Misc/python.man	Fri Jul 05 18:05:29 2013 -1000
+++ b/Misc/python.man	Sat Jul 06 12:15:21 2013 +0300
@@ -172,7 +172,8 @@
 is explicitly imported later.
 .TP
 .B \-u
-Force the binary I/O layers of stdin, stdout and stderr to be unbuffered.
+Force the binary I/O layers of stdout and stderr to be unbuffered.
+stdin is always buffered.
 The text I/O layer will still be line-buffered.
 .\" Note that there is internal buffering in readlines() and
 .\" file-object iterators ("for line in sys.stdin") which is not
diff -r 6d278f426417 Modules/main.c
--- a/Modules/main.c	Fri Jul 05 18:05:29 2013 -1000
+++ b/Modules/main.c	Sat Jul 06 12:15:21 2013 +0300
@@ -73,7 +73,8 @@
 -S     : don't imply 'import site' on initialization\n\
 ";
 static char *usage_3 = "\
--u     : unbuffered binary stdout and stderr; also PYTHONUNBUFFERED=x\n\
+-u     : unbuffered binary stdout and stderr, stdin always buffered;\n\
+         also PYTHONUNBUFFERED=x\n\
          see man page for details on internal buffering relating to '-u'\n\
 -v     : verbose (trace import statements); also PYTHONVERBOSE=x\n\
          can be supplied multiple times to increase verbosity\n\