diff --git a/sat/memory/persistent.py b/sat/memory/persistent.py
index 626a413f..a272229a 100644
--- a/sat/memory/persistent.py
+++ b/sat/memory/persistent.py
@@ -241,3 +241,11 @@ class LazyPersistentBinaryDict(PersistentBinaryDict):
         @return: deferred fired when data is actually saved
         """
         return self.storage.setPrivateValue(self.namespace, name, value, self.binary, self.profile)
+
+    def remove(self, key):
+        """Delete a key from sotrage, and return a deferred called when it's done
+
+        @param key(unicode): key to delete
+        @return (D): A deferred fired when delete is done
+        """
+        return self.storage.delPrivateValue(self.namespace, key, self.binary, self.profile)