diff --git a/model_utils/tracker.py b/model_utils/tracker.py
index e1e61fe..9c6de5a 100644
--- a/model_utils/tracker.py
+++ b/model_utils/tracker.py
@@ -186,10 +186,7 @@ class FieldInstanceTracker(object):
                 field_tracker = FileDescriptorTracker(field_obj.field)
                 setattr(self.instance.__class__, field, field_tracker)
             else:
-                if django.VERSION < (2, 1):
-                    field_tracker = DeferredAttributeTracker(field, type(self.instance))
-                else:
-                    field_tracker = DeferredAttributeTracker(field)
+                field_tracker = DeferredAttributeTracker(field, type(self.instance))
                 setattr(self.instance.__class__, field, field_tracker)