diff --git a/Doc/library/imp.rst b/Doc/library/imp.rst
index 1345b25..7270e3c 100644
--- a/Doc/library/imp.rst
+++ b/Doc/library/imp.rst
@@ -30,6 +30,9 @@
    :const:`PY_SOURCE`, :const:`PY_COMPILED`, or :const:`C_EXTENSION`, described
    below.
 
+   .. deprecated:: 3.3
+      Use the constants defined on :mod:`importlib.machinery` instead.
+
 
 .. function:: find_module(name[, path])
 
diff --git a/Doc/library/importlib.rst b/Doc/library/importlib.rst
index 6855a79..ddfaa21 100644
--- a/Doc/library/importlib.rst
+++ b/Doc/library/importlib.rst
@@ -477,6 +477,43 @@
 This module contains the various objects that help :keyword:`import`
 find and load modules.
 
+.. attribute:: SOURCE_SUFFIXES
+
+   A list of strings representing the recognized file suffixes for source
+   modules.
+
+   .. versionadded:: 3.3
+
+.. attribute:: DEBUG_BYTECODE_SUFFIXES
+
+   A list of strings representing the file suffixes for non-optimized bytecode
+   modules.
+
+   .. versionadded:: 3.3
+
+.. attribute:: OPTIMIZED_BYTECODE_SUFFIXES
+
+   A list of strings representing the file suffixes for optimized bytecode
+   modules.
+
+   .. versionadded:: 3.3
+
+.. attribute:: BYTECODE_SUFFIXES
+
+   A list of strings representing the recognized file suffixes for bytecode
+   modules. Set to either :attr:`DEBUG_BYTECODE_SUFFIXES` or
+   :attr:`OPTIMIZED_BYTECODE_SUFFIXES` based on whether ``__debug__`` is true.
+
+   .. versionadded:: 3.3
+
+.. attribute:: EXTENSION_SUFFIXES
+
+   A list of strings representing the the recognized file suffixes for
+   extension modules.
+
+   .. versionadded:: 3.3
+
+
 .. class:: BuiltinImporter
 
     An :term:`importer` for built-in modules. All known built-in modules are
diff --git a/Doc/library/inspect.rst b/Doc/library/inspect.rst
index 90b7220..611f780 100644
--- a/Doc/library/inspect.rst
+++ b/Doc/library/inspect.rst
@@ -190,6 +190,10 @@
    compared to the constants defined in the :mod:`imp` module; see the
    documentation for that module for more information on module types.
 
+   .. deprecated:: 3.3
+      You may check the file path's suffix against the supported suffixes
+      listed in :mod:`importlib.machinery` to infer the same information.
+
 
 .. function:: getmodulename(path)