diff --git a/pep-0484.txt b/pep-0484.txt
index de010de78c4..5d27af5c386 100644
--- a/pep-0484.txt
+++ b/pep-0484.txt
@@ -1657,7 +1657,10 @@ Additional notes on stub files:
 * However, as an exception to the previous bullet, all objects
   imported into a stub using ``from ... import *`` are considered
   exported.  (This makes it easier to re-export all objects from a
-  given module that may vary by Python version.)
+  given module that may vary by Python version.) Similarly, imports
+  of submodules in the ``__init__.pyi`` files of a package are
+  considered exported. For example, if ``a/__init__.pyi`` contains
+  just ``from . import b``, then ``b`` is exported.
 
 * Stub files may be incomplete. To make type checkers aware of this, the file
   can contain the following code::