diff --git a/Lib/test/test_builtin.py b/Lib/test/test_builtin.py
index 8cc1b00..2ede0e8 100644
--- a/Lib/test/test_builtin.py
+++ b/Lib/test/test_builtin.py
@@ -1633,6 +1633,17 @@ class TestSorted(unittest.TestCase):
         data = 'The quick Brown fox Jumped over The lazy Dog'.split()
         self.assertRaises(TypeError, sorted, data, None, lambda x,y: 0)
 
+    def test_flexible_signature(self):
+        data = list(range(100))
+        copy = data[:]
+        random.shuffle(copy)
+        self.assertEqual(data, sorted(iterable=copy))
+        self.assertEqual(data, sorted(iterable=copy, key=lambda x: -x,
+                                      reverse=True))
+        self.assertEqual(data, sorted(copy, lambda x: x))
+        self.assertEqual(data, sorted(copy, lambda x: -x), True)
+        self.assertRaises(TypeError, sorted)
+
 
 class ShutdownTest(unittest.TestCase):
 
diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index 31d9e0e..aee05da 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -2089,10 +2089,10 @@ PyDoc_STRVAR(builtin_sorted__doc__,
 static PyObject *
 builtin_sorted(PyObject *self, PyObject *args, PyObject *kwds)
 {
-    PyObject *newlist, *v, *seq, *keyfunc=NULL, *newargs;
+    PyObject *newlist, *v, *seq, *keyfunc=NULL, *newargs, *newkwds=NULL;
     PyObject *callable;
     static char *kwlist[] = {"iterable", "key", "reverse", 0};
-    int reverse;
+    int reverse = -1;
 
     /* args 1-3 should match listsort in Objects/listobject.c */
     if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|Oi:sorted",
@@ -2109,15 +2109,32 @@ builtin_sorted(PyObject *self, PyObject *args, PyObject *kwds)
         return NULL;
     }
 
-    newargs = PyTuple_GetSlice(args, 1, 4);
+    newargs = PyTuple_New(0);
     if (newargs == NULL) {
         Py_DECREF(newlist);
         Py_DECREF(callable);
         return NULL;
     }
 
-    v = PyObject_Call(callable, newargs, kwds);
+    if (keyfunc != NULL || reverse != -1) {
+        if (keyfunc == NULL) {
+            newkwds = Py_BuildValue("{s:i}", "reverse", reverse);
+        } else if (reverse != -1) {
+            newkwds = Py_BuildValue("{s:O,s:i}", "key", keyfunc, "reverse", reverse);
+        } else {
+            newkwds = Py_BuildValue("{s:O}", "key", keyfunc);
+        }
+        if (newkwds == NULL) {
+            Py_DECREF(newlist);
+            Py_DECREF(callable);
+            Py_DECREF(newargs);
+            return NULL;
+        }
+    }
+
+    v = PyObject_Call(callable, newargs, newkwds);
     Py_DECREF(newargs);
+    Py_XDECREF(newkwds);
     Py_DECREF(callable);
     if (v == NULL) {
         Py_DECREF(newlist);