diff --git a/param/parameterized.py b/param/parameterized.py
index c62bc8550..008d0c573 100644
--- a/param/parameterized.py
+++ b/param/parameterized.py
@@ -4450,7 +4450,7 @@ def instance(self_or_cls,**params):
             cls = self_or_cls
         else:
             p = params
-            params = self_or_cls.param.values()
+            params = self_or_cls.param.objects()
             params.update(p)
             params.pop('name')
             cls = self_or_cls.__class__