diff --git a/model_utils/tracker.py b/model_utils/tracker.py
index a145b1a..a0bc0d0 100644
--- a/model_utils/tracker.py
+++ b/model_utils/tracker.py
@@ -187,7 +187,10 @@ class FieldInstanceTracker(object):
                 field_tracker = FileDescriptorTracker(field_obj.field)
                 setattr(self.instance.__class__, field, field_tracker)
             else:
-                field_tracker = DeferredAttributeTracker(field, type(self.instance))
+                if django.VERSION < (2, 1):
+                    field_tracker = DeferredAttributeTracker(field, type(self.instance))
+                else:
+                    field_tracker = DeferredAttributeTracker(field)
                 setattr(self.instance.__class__, field, field_tracker)
 
 
diff --git a/tests/models.py b/tests/models.py
index 91df0b6..7c9bb56 100644
--- a/tests/models.py
+++ b/tests/models.py
@@ -1,5 +1,6 @@
 from __future__ import unicode_literals, absolute_import
 
+import django
 from django.db import models
 from django.db.models.query_utils import DeferredAttribute
 from django.db.models import Manager
@@ -346,7 +347,10 @@ class StringyDescriptor(object):
             return self
         if self.name in obj.get_deferred_fields():
             # This queries the database, and sets the value on the instance.
-            DeferredAttribute(field_name=self.name, model=cls).__get__(obj, cls)
+            if django.VERSION < (2, 1):
+                DeferredAttribute(field_name=self.name, model=cls).__get__(obj, cls)
+            else:
+                DeferredAttribute(field_name=self.name).__get__(obj, cls)
         return str(obj.__dict__[self.name])
 
     def __set__(self, obj, value):