diff --git a/src/Content/ContentDbDict.py b/src/Content/ContentDbDict.py
index 4e1551ee..f9b7691b 100644
--- a/src/Content/ContentDbDict.py
+++ b/src/Content/ContentDbDict.py
@@ -55,7 +55,6 @@ class ContentDbDict(dict):
             return self.loadItem(key)
 
     def __setitem__(self, key, val):
-        dict.__setitem__(self, key, val)
         self.addCachedKey(key)
         self.checkLimit()
         size = self.getItemSize(key)