diff --git a/py/code/code.py b/py/code/code.py
index a01984383..6e1adc403 100644
--- a/py/code/code.py
+++ b/py/code/code.py
@@ -15,7 +15,7 @@ class Code(object):
     def __eq__(self, other): 
         return self.raw == other.raw
 
-    def __ne__(self):
+    def __ne__(self, other):
         return not self == other
 
     def new(self, rec=False, **kwargs): 
diff --git a/py/code/testing/test_code.py b/py/code/testing/test_code.py
index c2b0ff978..ae2fbb93a 100644
--- a/py/code/testing/test_code.py
+++ b/py/code/testing/test_code.py
@@ -8,6 +8,12 @@ def test_newcode():
     newco = code.new() 
     assert co == newco 
 
+def test_ne():
+    code1 = py.code.Code(compile('foo = "bar"', '', 'exec'))
+    assert code1 == code1
+    code2 = py.code.Code(compile('foo = "baz"', '', 'exec'))
+    assert code2 != code1
+
 def test_newcode_unknown_args(): 
     code = py.code.Code(compile("", '', 'exec'))
     py.test.raises(TypeError, 'code.new(filename="hello")')