=== modified file 'capturemock/pythonclient.py'
--- capturemock/pythonclient.py	2013-12-10 20:09:34 +0000
+++ capturemock/pythonclient.py	2013-12-11 06:55:13 +0000
@@ -118,6 +118,10 @@
             metaClass = type(proxyTargetClass)
             if metaClass not in [ type, types.ClassType ]:
                 metaClassName = self.captureMockNameFinder.makeMetaClass(metaClass)
+        elif '(_abcoll.MutableMapping)' in classDesc:
+            import abc
+            metaClass = abc.ABCMeta
+            metaClassName = self.captureMockNameFinder.makeMetaClass(metaClass)
         return self.captureMockNameFinder.makeClass(classDesc, metaClassName)
         
     def captureMockCreateClassProxy(self, proxyName, proxyTarget, classDesc):