--- a/Python/codecs.c	Mon Oct 29 18:20:18 2012 -0500
+++ b/Python/codecs.c	Tue Oct 30 01:42:39 2012 +0100
@@ -761,7 +761,7 @@
         for (i = start; i < end; i++) {
             /* object is guaranteed to be "ready" */
             Py_UCS4 ch = PyUnicode_READ_CHAR(object, i);
-            if (ch < 0xd800 || ch > 0xdfff) {
+            if (!Py_UNICODE_IS_SURROGATE(ch)) {
                 /* Not a surrogate, fail with original exception */
                 PyErr_SetObject(PyExceptionInstance_Class(exc), exc);
                 Py_DECREF(res);
@@ -797,7 +797,7 @@
              (p[2] & 0xc0) == 0x80)) {
             /* it's a three-byte code */
             ch = ((p[0] & 0x0f) << 12) + ((p[1] & 0x3f) << 6) + (p[2] & 0x3f);
-            if (ch < 0xd800 || ch > 0xdfff)
+            if (!Py_UNICODE_IS_SURROGATE(ch))
                 /* it's not a surrogate - fail */
                 ch = 0;
         }