diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index 499f328..e536f0a 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -730,6 +730,17 @@
 10. Number of stack pops performed by call_function()"
 );
 
+static PyObject *
+sys_cleartypecache(PyObject* self, PyObject* args)
+{
+	PyType_ClearCache();
+	Py_RETURN_NONE;
+}
+
+PyDoc_STRVAR(cleartypecache_doc,
+"_cleartypecache() -> None\n\
+Clear the internal type lookup cache.");
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -752,6 +763,8 @@
 	/* Might as well keep this in alphabetic order */
 	{"callstats", (PyCFunction)PyEval_GetCallStats, METH_NOARGS,
 	 callstats_doc},
+	{"_cleartypecache", sys_cleartypecache, METH_NOARGS,
+	 cleartypecache_doc},
 	{"_current_frames", sys_current_frames, METH_NOARGS,
 	 current_frames_doc},
 	{"displayhook",	sys_displayhook, METH_O, displayhook_doc},