diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst
index a98c5d4..d830490 100644
--- a/Doc/library/sys.rst
+++ b/Doc/library/sys.rst
@@ -240,6 +240,44 @@
       Use :mod:`atexit` instead.
 
 
+.. data:: flags
+
+   The struct sequence *flags* exposes the status of command line flags. The
+   attributes are read only.
+
+   +------------------------------+------------------------------------------+
+   | attribute                    | flag                                     |
+   +==============================+==========================================+
+   | :const:`debug`               | -d                                       |
+   +------------------------------+------------------------------------------+
+   | :const:`py3k_warning`        | -3                                       |
+   +------------------------------+------------------------------------------+
+   | :const:`division_warning`    | -Q                                       |
+   +------------------------------+------------------------------------------+
+   | :const:`division_new`        | -Qnew                                    |
+   +------------------------------+------------------------------------------+
+   | :const:`inspect`             | -i                                       |
+   +------------------------------+------------------------------------------+
+   | :const:`interactive`         | -i                                       |
+   +------------------------------+------------------------------------------+
+   | :const:`optimize`            | -O or -OO                                |
+   +------------------------------+------------------------------------------+
+   | :const:`dont_write_bytecode` | -B                                       |
+   +------------------------------+------------------------------------------+
+   | :const:`no_site`             | -S                                       |
+   +------------------------------+------------------------------------------+
+   | :const:`ingnore_environment` | -E                                       |
+   +------------------------------+------------------------------------------+
+   | :const:`tabcheck`            | -t or -tt                                |
+   +------------------------------+------------------------------------------+
+   | :const:`verbose`             | -v                                       |
+   +------------------------------+------------------------------------------+
+   | :const:`unicode`             | -U                                       |
+   +------------------------------+------------------------------------------+
+
+   .. versionadded:: 2.6
+
+
 .. data:: float_info
 
    A dict holding information about the float type. It contains low level