diff --git a/Misc/NEWS b/Misc/NEWS
index 4f7f8d8..2791cbe 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -230,6 +230,12 @@
   unicode instance if the argument is not an instance of basestring and
   calling __str__ on the argument returns a unicode instance.
 
+- Patch #1413181:  changed ``PyThreadState_Delete()`` to forget about the
+  current thread state when the auto-GIL-state machinery knows about
+  it (since the thread state is being deleted, continuing to remember it
+  can't help, but can hurt if another thread happens to get created with
+  the same thread id).
+
 Extension Modules
 -----------------
 
diff --git a/Python/pystate.c b/Python/pystate.c
index 6584cda..867334e 100644
--- a/Python/pystate.c
+++ b/Python/pystate.c
@@ -262,6 +262,10 @@
 	if (tstate == _PyThreadState_Current)
 		Py_FatalError("PyThreadState_Delete: tstate is still current");
 	tstate_delete_common(tstate);
+#ifdef WITH_THREAD
+	if (autoTLSkey && PyThread_get_key_value(autoTLSkey) == tstate)
+		PyThread_delete_key_value(autoTLSkey);
+#endif /* WITH_THREAD */
 }