diff --git a/django/contrib/contenttypes/generic.py b/django/contrib/contenttypes/generic.py
index 0d542a4a4e0..2a9f4d3ac69 100644
--- a/django/contrib/contenttypes/generic.py
+++ b/django/contrib/contenttypes/generic.py
@@ -297,11 +297,7 @@ class BaseGenericInlineFormSet(BaseModelFormSet):
         # Avoid a circular import.
         from django.contrib.contenttypes.models import ContentType
         opts = self.model._meta
-        if instance is None:
-            self.instance = self.model()
-        else:
-            self.instance = instance
-        self.save_as_new = save_as_new
+        self.instance = instance
         self.rel_name = '-'.join((
             opts.app_label, opts.object_name.lower(),
             self.ct_field.name, self.ct_fk_field.name,
@@ -328,19 +324,15 @@ class BaseGenericInlineFormSet(BaseModelFormSet):
         ))
     get_default_prefix = classmethod(get_default_prefix)
 
-    def _construct_form(self, i, **kwargs):
+    def save_new(self, form, commit=True):
         # Avoid a circular import.
         from django.contrib.contenttypes.models import ContentType
-        form = super(BaseGenericInlineFormSet, self)._construct_form(i, **kwargs)
-        if self.save_as_new:
-            # Remove the key from the form's data, we are only creating new instances.
-            form.data[form.add_prefix(self.ct_fk_field.name)] = None
-            form.data[form.add_prefix(self.ct_field.name)] = None
-
-        # Set the GenericForeignKey value here so that the form can do its validation.
-        setattr(form.instance, self.ct_fk_field.attname, self.instance.pk)
-        setattr(form.instance, self.ct_field.attname, ContentType.objects.get_for_model(self.instance).pk)
-        return form
+        kwargs = {
+            self.ct_field.get_attname(): ContentType.objects.get_for_model(self.instance).pk,
+            self.ct_fk_field.get_attname(): self.instance.pk,
+        }
+        new_obj = self.model(**kwargs)
+        return save_instance(form, new_obj, commit=commit)
 
 def generic_inlineformset_factory(model, form=ModelForm,
                                   formset=BaseGenericInlineFormSet,
diff --git a/tests/regressiontests/generic_inline_admin/models.py b/tests/regressiontests/generic_inline_admin/models.py
index 9f1bbadd3eb..2925b7a8010 100644
--- a/tests/regressiontests/generic_inline_admin/models.py
+++ b/tests/regressiontests/generic_inline_admin/models.py
@@ -72,3 +72,24 @@ class MediaExcludeInline(generic.GenericTabularInline):
 
 admin.site.register(EpisodeExclude, inlines=[MediaExcludeInline])
 
+#
+# Generic inline with unique_together
+#
+
+class PhoneNumber(models.Model):
+    content_type = models.ForeignKey(ContentType)
+    object_id = models.PositiveIntegerField()
+    content_object = generic.GenericForeignKey('content_type', 'object_id')
+    phone_number = models.CharField(max_length=30)
+
+    class Meta:
+        unique_together = (('content_type', 'object_id', 'phone_number',),)
+
+class Contact(models.Model):
+    name = models.CharField(max_length=50)
+    phone_numbers = generic.GenericRelation(PhoneNumber)
+
+class PhoneNumberInline(generic.GenericTabularInline):
+    model = PhoneNumber
+
+admin.site.register(Contact, inlines=[PhoneNumberInline])
diff --git a/tests/regressiontests/generic_inline_admin/tests.py b/tests/regressiontests/generic_inline_admin/tests.py
index 0cf1f4ea699..21704cd8deb 100644
--- a/tests/regressiontests/generic_inline_admin/tests.py
+++ b/tests/regressiontests/generic_inline_admin/tests.py
@@ -176,3 +176,25 @@ class GenericInlineAdminParametersTest(TestCase):
         response = self.client.get('/generic_inline_admin/admin/generic_inline_admin/episodeexclude/%s/' % e.pk)
         formset = response.context['inline_admin_formsets'][0].formset
         self.failIf('url' in formset.forms[0], 'The formset has excluded "url" field.')
+
+class GenericInlineAdminWithUniqueTogetherTest(TestCase):
+    fixtures = ['users.xml']
+
+    def setUp(self):
+        self.client.login(username='super', password='secret')
+
+    def tearDown(self):
+        self.client.logout()
+
+    def testAdd(self):
+        post_data = {
+            "name": u"John Doe",
+            # inline data
+            "generic_inline_admin-phonenumber-content_type-object_id-TOTAL_FORMS": u"1",
+            "generic_inline_admin-phonenumber-content_type-object_id-INITIAL_FORMS": u"0",
+            "generic_inline_admin-phonenumber-content_type-object_id-0-id": "",
+            "generic_inline_admin-phonenumber-content_type-object_id-0-phone_number": "555-555-5555",
+        }
+        response = self.client.get('/generic_inline_admin/admin/generic_inline_admin/contact/add/')
+        response = self.client.post('/generic_inline_admin/admin/generic_inline_admin/contact/add/', post_data)
+        self.failUnlessEqual(response.status_code, 302) # redirect somewhere