diff --git a/Doc/using/cmdline.rst b/Doc/using/cmdline.rst
index a444228..0199f9f 100644
--- a/Doc/using/cmdline.rst
+++ b/Doc/using/cmdline.rst
@@ -95,8 +95,9 @@
       file is not available.
 
    If this option is given, the first element of :data:`sys.argv` will be the
-   full path to the module file. As with the :option:`-c` option, the current
-   directory will be added to the start of :data:`sys.path`.
+   full path to the module file (while the module file is being located, the
+   first element will be set to ``"-m"``). As with the :option:`-c` option,
+   the current directory will be added to the start of :data:`sys.path`.
 
    Many standard library modules contain code that is invoked on their execution
    as a script.  An example is the :mod:`timeit` module::