diff --git a/docs/changelog.rst b/docs/changelog.rst
index 545ce76d..4c5bf525 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -2,6 +2,10 @@
 Changelog
 =========
 
+Changes in 0.6.15
+=================
+- Deref list custom id fix
+
 Changes in 0.6.14
 =================
 - Fixed error dict with nested validation
diff --git a/mongoengine/queryset.py b/mongoengine/queryset.py
index 04d46414..f94b7092 100644
--- a/mongoengine/queryset.py
+++ b/mongoengine/queryset.py
@@ -4,6 +4,8 @@ import copy
 import itertools
 import operator
 
+from functools import partial
+
 import pymongo
 from bson.code import Code
 
@@ -1871,10 +1873,13 @@ class QuerySetManager(object):
         queryset_class = owner._meta['queryset_class'] or QuerySet
         queryset = queryset_class(owner, owner._get_collection())
         if self.get_queryset:
-            if self.get_queryset.func_code.co_argcount == 1:
+            var_names = self.get_queryset.func_code.co_varnames
+            if var_names == ('queryset',):
                 queryset = self.get_queryset(queryset)
-            else:
+            elif var_names == ('doc_cls', 'queryset',):
                 queryset = self.get_queryset(owner, queryset)
+            else:
+                queryset = partial(self.get_queryset, owner, queryset)
         return queryset