diff -r 48970d754841 Lib/test/test_parser.py
--- a/Lib/test/test_parser.py	Thu Mar 17 17:06:27 2011 +0800
+++ b/Lib/test/test_parser.py	Thu Mar 17 18:50:27 2011 +0100
@@ -527,6 +527,14 @@
         code2 = parser.compilest(st)
         self.assertEqual(eval(code2), -3)
 
+    def test_compile_assignment_to_bytes_literal(self):
+        st = parser.suite('b"" = 1')
+        self.assertRaises(SyntaxError, parser.compilest, st)
+
+    def test_compile_augmented_assignment_to_bytes_literal(self):
+        st = parser.suite('b"" += 1')
+        self.assertRaises(SyntaxError, parser.compilest, st)
+
 class ParserStackLimitTestCase(unittest.TestCase):
     """try to push the parser to/over its limits.
     see http://bugs.python.org/issue1881 for a discussion
diff -r 48970d754841 Python/ast.c
--- a/Python/ast.c	Thu Mar 17 17:06:27 2011 +0800
+++ b/Python/ast.c	Thu Mar 17 18:50:27 2011 +0100
@@ -483,6 +483,7 @@
         case Set_kind:
         case Num_kind:
         case Str_kind:
+        case Bytes_kind:
             expr_name = "literal";
             break;
         case Ellipsis_kind: