diff --git a/ipalib/plugable.py b/ipalib/plugable.py
index e017a8a42..801ef7ab5 100644
--- a/ipalib/plugable.py
+++ b/ipalib/plugable.py
@@ -132,6 +132,7 @@ class Proxy(ReadOnly):
 	"""
 
 	__slots__ = (
+		'__call__',
 		'__obj',
 		'name',
 	)
@@ -145,6 +146,8 @@ class Proxy(ReadOnly):
 		assert isinstance(proxy_name, str)
 		object.__setattr__(self, '_Proxy__obj', obj)
 		object.__setattr__(self, 'name', proxy_name)
+		if callable(obj):
+			object.__setattr__(self, '__call__', obj.__call__)
 		#for name in self.__slots__:
 		#	object.__setattr__(self, name, getattr(obj, name))