diff --git a/volatility/framework/symbols/windows/extensions/registry.py b/volatility/framework/symbols/windows/extensions/registry.py
index c633bcfa3..7a59efd98 100644
--- a/volatility/framework/symbols/windows/extensions/registry.py
+++ b/volatility/framework/symbols/windows/extensions/registry.py
@@ -193,4 +193,4 @@ class _CM_KEY_VALUE(objects.Struct):
 
         # Fall back if it's something weird
         vollog.debug("Unknown registry value type encountered: {}".format(self.Type))
-        return self.Data.cast("string", max_length = self.DataLength, encoding = "latin-1")
+        return self.Data.cast("string", max_length = datalen, encoding = "latin-1")