diff --git a/volatility/framework/interfaces/configuration.py b/volatility/framework/interfaces/configuration.py
index 5687ea026..653b88d47 100644
--- a/volatility/framework/interfaces/configuration.py
+++ b/volatility/framework/interfaces/configuration.py
@@ -298,7 +298,7 @@ class HierarchicalDict(collections.Mapping):
         """Set an item or appends a whole subtree at a key location"""
         if self.separator in key:
             subdict = self._subdict.get(self._key_head(key), HierarchicalDict(separator = self.separator))
-            subdict[self._key_tail(key)] = value
+            subdict._setitem(self._key_tail(key), value, is_data)
             self._subdict[self._key_head(key)] = subdict
         else:
             if is_data: