diff --git a/Doc/library/subprocess.rst b/Doc/library/subprocess.rst
index e0bb163..a346d98 100644
--- a/Doc/library/subprocess.rst
+++ b/Doc/library/subprocess.rst
@@ -153,10 +153,15 @@
 
    If *close_fds* is true, all file descriptors except :const:`0`, :const:`1` and
    :const:`2` will be closed before the child process is executed. (Unix only).
-   Or, on Windows, if *close_fds* is true then no handles will be inherited by the
+   The recommended value for this argument is True.
+   On Windows, if *close_fds* is true then no handles will be inherited by the
    child process.  Note that on Windows, you cannot set *close_fds* to true and
    also redirect the standard handles by setting *stdin*, *stdout* or *stderr*.
 
+.. versionchanged:: 3.2
+   Callers should always specify a *close_fds* to avoid a DeprecationWarning.
+   The default value for this argument will be changing in Python 3.3.
+
    If *shell* is :const:`True`, the specified command will be executed through the
    shell.
 
diff --git a/Lib/subprocess.py b/Lib/subprocess.py
index bdbcc6b..ca67012 100644
--- a/Lib/subprocess.py
+++ b/Lib/subprocess.py
@@ -339,6 +339,7 @@
 import gc
 import signal
 import builtins
+import warnings
 
 # Exception classes used by this module.
 class CalledProcessError(Exception):
@@ -378,7 +379,6 @@
         import _posixsubprocess
     except ImportError:
         _posixsubprocess = None
-        import warnings
         warnings.warn("The _posixsubprocess module is not being used. "
                       "Child process reliability may suffer if your "
                       "program uses threads.", RuntimeWarning)
@@ -605,7 +605,7 @@
 class Popen(object):
     def __init__(self, args, bufsize=0, executable=None,
                  stdin=None, stdout=None, stderr=None,
-                 preexec_fn=None, close_fds=False, shell=False,
+                 preexec_fn=None, close_fds=None, shell=False,
                  cwd=None, env=None, universal_newlines=False,
                  startupinfo=None, creationflags=0,
                  restore_signals=True, start_new_session=False):
@@ -618,6 +618,15 @@
         if not isinstance(bufsize, int):
             raise TypeError("bufsize must be an integer")
 
+        if close_fds is None:
+            # Notification for http://bugs.python.org/issue7213 & issue2320
+            warnings.warn(
+                    'The close_fds parameter was not specified.  Its default'
+                    ' will change from False to True in a future Python'
+                    ' version.  Most users should set it to True.  Please'
+                    ' update your code explicitly set close_fds.',
+                    DeprecationWarning)
+
         if mswindows:
             if preexec_fn is not None:
                 raise ValueError("preexec_fn is not supported on Windows "
diff --git a/Lib/test/test_subprocess.py b/Lib/test/test_subprocess.py
index ec1e186..8759941 100644
--- a/Lib/test/test_subprocess.py
+++ b/Lib/test/test_subprocess.py
@@ -9,6 +9,7 @@
 import time
 import re
 import sysconfig
+import warnings
 try:
     import gc
 except ImportError:
@@ -57,6 +58,34 @@
         self.assertEqual(actual, expected, msg)
 
 
+class DeprecationWarningTests(BaseTestCase):
+    def setUp(self):
+        BaseTestCase.setUp(self)
+        self._saved_warn = warnings.warn
+        self._warn_calls = []
+        warnings.warn = self._record_warn
+
+    def tearDown(self):
+        warnings.warn = self._saved_warn
+        BaseTestCase.tearDown(self)
+
+    def _record_warn(self, *args):
+        """A warnings.warn function that records calls."""
+        self._warn_calls.append(args)
+        self._saved_warn(*args)
+
+    def testCloseFdsWarning(self):
+        quick_process = [sys.executable, "-c", "import sys; sys.exit(0)"]
+        subprocess.call(quick_process, close_fds=True)
+        self.assertEqual([], self._warn_calls)
+        subprocess.call(quick_process, close_fds=False)
+        self.assertEqual([], self._warn_calls)
+        self.assertWarns(DeprecationWarning, subprocess.call, quick_process)
+        self.assertEqual(1, len(self._warn_calls))
+        self.assertIn('close_fds parameter was not specified',
+                      self._warn_calls[0][0])
+
+
 class ProcessTestCase(BaseTestCase):
 
     def test_call_seq(self):
@@ -1233,7 +1262,8 @@
                   ProcessTestCaseNoPoll,
                   HelperFunctionTests,
                   CommandsWithSpaces,
-                  ContextManagerTests)
+                  ContextManagerTests,
+                  DeprecationWarningTests)
 
     support.run_unittest(*unit_tests)
     support.reap_children()