diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index 6342ee3..613e4f7 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -843,7 +843,8 @@
 
    Update and return a dictionary representing the current local symbol table.
    Free variables are returned by :func:`locals` when it is called in function
-   blocks, but not in class blocks.
+   blocks, but not in class blocks. Note that at the module level, :func:`locals`
+   and :func:`globals` are the same dictionary.
 
    .. note::
       The contents of this dictionary should not be modified; changes may not