Index: Objects/enumobject.c
===================================================================
--- Objects/enumobject.c	(revision 63147)
+++ Objects/enumobject.c	(working copy)
@@ -15,8 +15,16 @@
 {
 	enumobject *en;
 	PyObject *seq = NULL;
+	PyObject *start = NULL;
 	static char *kwlist[] = {"sequence", 0};
 
+	if (kwds) {
+		start = PyDict_GetItemString(kwds, "start");
+		if (start) {
+			Py_INCREF(start);
+			PyDict_DelItemString(kwds, "start");
+		}
+	}
 	if (!PyArg_ParseTupleAndKeywords(args, kwds, "O:enumerate", kwlist,
 					 &seq))
 		return NULL;
@@ -24,9 +32,25 @@
 	en = (enumobject *)type->tp_alloc(type, 0);
 	if (en == NULL)
 		return NULL;
-	en->en_index = 0;
+	if (start) {
+		if (PyInt_Check(start)) {
+			en->en_index = PyInt_AsLong(start);
+			en->en_longindex = NULL;
+			Py_DECREF(start);
+		} else if (PyLong_Check(start)) {
+			en->en_index = LONG_MAX;
+			en->en_longindex = start;
+		} else {
+			PyErr_SetString(PyExc_TypeError,
+				"start value must be numeric");
+			Py_DECREF(start);
+			return NULL;
+		}
+	} else {
+		en->en_index = 0;
+		en->en_longindex = NULL;
+	}
 	en->en_sit = PyObject_GetIter(seq);
-	en->en_longindex = NULL;
 	if (en->en_sit == NULL) {
 		Py_DECREF(en);
 		return NULL;
Index: Lib/test/test_enumerate.py
===================================================================
--- Lib/test/test_enumerate.py	(revision 63147)
+++ Lib/test/test_enumerate.py	(working copy)
@@ -195,7 +195,23 @@
                 self.fail("non-callable __reversed__ didn't raise!")
         self.assertEqual(rc, sys.getrefcount(r))
 
+class TestStart(EnumerateTestCase):
+ 
+    enum = lambda i: enumerate(i, start=10)
+    seq, res = 'abc', [(10,'a'), (11,'b'), (12,'c')]
 
+class TestLongStart(EnumerateTestCase):
+
+    enum = lambda i: enumerate(i, start=sys.maxint+1)
+    seq, res = 'abc', [(sys.maxint+1,'a'), (sys.maxint+2,'b'),
+                       (sys.maxint+3,'c')]
+
+class EnumerateTestCase(unittest.TestCase):
+
+    enum = enumerate
+    seq, res = 'abc', [(0,'a'), (1,'b'), (2,'c')]
+
+
 def test_main(verbose=None):
     testclasses = (EnumerateTestCase, SubclassTestCase, TestEmpty, TestBig,
                    TestReversed)