diff --git a/Misc/NEWS b/Misc/NEWS
index 93636941910..c63db58bddb 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -163,6 +163,10 @@ Build
 
 C API
 
+- PyNumber_Coerce() and PyNumber_CoerceEx() now also invoke the type's
+  coercion if both arguments have the same type but this type has the
+  CHECKTYPES flag set.  This is to better support proxies.
+
 - The type of tp_free has been changed from "void (*)(PyObject *)" to
   "void (*)(void *)".
 
diff --git a/Objects/object.c b/Objects/object.c
index e47f80ea5b5..85fd35fc6b1 100644
--- a/Objects/object.c
+++ b/Objects/object.c
@@ -1427,7 +1427,10 @@ PyNumber_CoerceEx(PyObject **pv, PyObject **pw)
 	register PyObject *w = *pw;
 	int res;
 
-	if (v->ob_type == w->ob_type && !PyInstance_Check(v)) {
+	/* Shortcut only for old-style types */
+	if (v->ob_type == w->ob_type &&
+	    !PyType_HasFeature(v->ob_type, Py_TPFLAGS_CHECKTYPES))
+	{
 		Py_INCREF(v);
 		Py_INCREF(w);
 		return 0;