diff --git a/pympler/asizeof.py b/pympler/asizeof.py
index 213f5c5..fe9aad7 100644
--- a/pympler/asizeof.py
+++ b/pympler/asizeof.py
@@ -638,9 +638,12 @@ def _cell_refs(obj, named):
 
 
 def _namedtuple_refs(obj, named):
-    '''Return slots but exclude dict
+    '''Return specific referents of obj-as-sequence and slots but exclude dict.
     '''
-    return _refs(obj, named, '__class__', slots='__slots__')
+    for r in _refs(obj, named, '__class__', slots='__slots__'):
+        yield r
+    for r in obj:
+        yield r
 
 
 def _gen_refs(obj, named):
diff --git a/test/asizeof/test_asizeof.py b/test/asizeof/test_asizeof.py
index 210255c..3df84c7 100644
--- a/test/asizeof/test_asizeof.py
+++ b/test/asizeof/test_asizeof.py
@@ -307,7 +307,7 @@ def inner():
         self.assertTrue(size_closure >= size_data, (size_closure, size_data))
 
     def test_namedtuple(self):
-        '''Test namedtuple __dict__ property isn't included
+        '''Test values are included but namedtuple __dict__ isn't.
         '''
         from collections import namedtuple
         Point = namedtuple('Point', ['x', 'y'])
@@ -315,6 +315,7 @@ def test_namedtuple(self):
         size = asizeof.asized(point, detail=1)
         refs = [ref.name for ref in size.refs]
         self.assertTrue('__dict__' not in refs, refs)
+        self.assertTrue('11' in refs, refs)
 
 
 class FunctionTest(unittest.TestCase):