diff --git a/CHANGES.rst b/CHANGES.rst
index 6f5ecd8..cd1bb7d 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -3,6 +3,7 @@ CHANGES
 
 4.0.1 (unreleased)
 ------------------
+- Update InheritanceQuerySetMixin to avoid querying too much tables
 - TimeStampedModel now automatically adds 'modified' field as an update_fields
   parameter even if it is forgotten while using save()
 - `FieldTracker` now marks fields as not changed after `refresh_from_db`
diff --git a/model_utils/managers.py b/model_utils/managers.py
index 105794b..3725eab 100644
--- a/model_utils/managers.py
+++ b/model_utils/managers.py
@@ -75,7 +75,10 @@ class InheritanceQuerySetMixin:
 
         # workaround https://code.djangoproject.com/ticket/16855
         previous_select_related = self.query.select_related
-        new_qs = self.select_related(*subclasses)
+        if subclasses:
+            new_qs = self.select_related(*subclasses)
+        else:
+            new_qs = self
         previous_is_dict = isinstance(previous_select_related, dict)
         new_is_dict = isinstance(new_qs.query.select_related, dict)
         if previous_is_dict and new_is_dict:
diff --git a/tests/test_managers/test_inheritance_manager.py b/tests/test_managers/test_inheritance_manager.py
index 2481b5c..43ce50b 100644
--- a/tests/test_managers/test_inheritance_manager.py
+++ b/tests/test_managers/test_inheritance_manager.py
@@ -487,6 +487,14 @@ class InheritanceManagerRelatedTests(InheritanceManagerTests):
                 id=self.child1.id),
             self.child1)
 
+    def test_get_method_with_select_subclasses_check_for_useless_join(self):
+        child4 = InheritanceManagerTestChild4.objects.create(related=self.related, other_onetoone=self.child1)
+        self.assertEqual(
+            str(InheritanceManagerTestChild4.objects.select_subclasses().filter(
+                id=child4.id).query),
+            str(InheritanceManagerTestChild4.objects.select_subclasses().select_related(None).filter(
+                id=child4.id).query))
+
     def test_annotate_with_select_subclasses(self):
         qs = InheritanceManagerTestParent.objects.select_subclasses().annotate(
             models.Count('id'))