diff --git a/Doc/using/cmdline.rst b/Doc/using/cmdline.rst
index 5f6bda5..b113c8f 100644
--- a/Doc/using/cmdline.rst
+++ b/Doc/using/cmdline.rst
@@ -145,6 +145,14 @@
 Miscellaneous options
 ~~~~~~~~~~~~~~~~~~~~~
 
+.. cmdoption:: -B
+
+   If given, Python won't try to write ``.pyc`` or ``.pyo`` files on the
+   import of source modules.  See also :envvar:`PYTHONDONTWRITEBYTECODE`.
+
+   .. versionadded:: 2.6
+
+
 .. cmdoption:: -d
 
    Turn on parser debugging output (for wizards only, depending on compilation
@@ -411,3 +419,10 @@
    If this is set, Python ignores case in :keyword:`import` statements.  This
    only works on Windows.
 
+
+.. envvar:: PYTHONDONTWRITEBYTECODE
+
+   If given, Python won't try to write ``.pyc`` or ``.pyo`` files on the
+   import of source modules.
+
+   .. versionadded:: 2.6