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diff --git a/‎doc/api/api_changes.rst
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@@ -136,6 +136,9 @@ Changes in 1.2.x
   and py2.7. It is anticipated that the Qt3 support will be completely
   removed for the next release.
 
+* :class:`~matplotlib.colors.ColorConverter`,
+  :class:`~matplotlib.colors.Colormap` and
+  :class:`~matplotlib.colors.Normalize` now subclasses ``object``
 
 Changes in 1.1.x
 ================