diff --git a/django/contrib/contenttypes/fields.py b/django/contrib/contenttypes/fields.py
index ed98ecb48cb..62284e980e3 100644
--- a/django/contrib/contenttypes/fields.py
+++ b/django/contrib/contenttypes/fields.py
@@ -1,3 +1,4 @@
+import functools
 from collections import defaultdict
 
 from django.contrib.contenttypes.models import ContentType
@@ -515,17 +516,18 @@ def create_generic_related_manager(superclass, rel):
             self.instance = instance
 
             self.model = rel.model
-
-            content_type = ContentType.objects.db_manager(instance._state.db).get_for_model(
-                instance, for_concrete_model=rel.field.for_concrete_model)
-            self.content_type = content_type
+            self.get_content_type = functools.partial(
+                ContentType.objects.db_manager(instance._state.db).get_for_model,
+                for_concrete_model=rel.field.for_concrete_model,
+            )
+            self.content_type = self.get_content_type(instance)
             self.content_type_field_name = rel.field.content_type_field_name
             self.object_id_field_name = rel.field.object_id_field_name
             self.prefetch_cache_name = rel.field.attname
             self.pk_val = instance.pk
 
             self.core_filters = {
-                '%s__pk' % self.content_type_field_name: content_type.id,
+                '%s__pk' % self.content_type_field_name: self.content_type.id,
                 self.object_id_field_name: self.pk_val,
             }