diff --git a/django/contrib/admin/helpers.py b/django/contrib/admin/helpers.py
index b969653317..33050c3cd4 100644
--- a/django/contrib/admin/helpers.py
+++ b/django/contrib/admin/helpers.py
@@ -140,7 +140,7 @@ class AdminReadonlyField(object):
         if not self.is_first:
             attrs["class"] = "inline"
         name = forms.forms.pretty_name(
-            label_for_field(self.field, self.model_admin.model, self.model_admin)
+            label_for_field(self.field, self.form._meta.model, self.model_admin)
         )
         contents = force_unicode(escape(name)) + u":"
         return mark_safe('<label%(attrs)s>%(contents)s</label>' % {
@@ -232,7 +232,7 @@ class InlineAdminForm(AdminForm):
             self.original_content_type_id = ContentType.objects.get_for_model(original).pk
         self.show_url = original and hasattr(original, 'get_absolute_url')
         super(InlineAdminForm, self).__init__(form, fieldsets, prepopulated_fields,
-            readonly_fields)
+            readonly_fields, model_admin)
 
     def __iter__(self):
         for name, options in self.fieldsets:
diff --git a/tests/regressiontests/admin_inlines/models.py b/tests/regressiontests/admin_inlines/models.py
index 9b491eb939..2c6a64dc7a 100644
--- a/tests/regressiontests/admin_inlines/models.py
+++ b/tests/regressiontests/admin_inlines/models.py
@@ -38,11 +38,13 @@ class Holder(models.Model):
 class Inner(models.Model):
     dummy = models.IntegerField()
     holder = models.ForeignKey(Holder)
+    readonly = models.CharField("Inner readonly label", max_length=1)
 
 
 class InnerInline(admin.StackedInline):
     model = Inner
     can_delete = False
+    readonly_fields = ('readonly',) # For bug #13174 tests.
 
 
 class Holder2(models.Model):
diff --git a/tests/regressiontests/admin_inlines/tests.py b/tests/regressiontests/admin_inlines/tests.py
index 9207c5521c..1ac0100b4a 100644
--- a/tests/regressiontests/admin_inlines/tests.py
+++ b/tests/regressiontests/admin_inlines/tests.py
@@ -4,6 +4,7 @@ from django.test import TestCase
 from models import Holder, Inner, InnerInline
 from models import Holder2, Inner2, Holder3, Inner3
 
+
 class TestInline(TestCase):
     fixtures = ['admin-views-users.xml']
 
@@ -29,6 +30,15 @@ class TestInline(TestCase):
         actual = inner_formset.can_delete
         self.assertEqual(expected, actual, 'can_delete must be equal')
 
+    def test_readonly_stacked_inline_label(self):
+        """Bug #13174."""
+        holder = Holder.objects.create(dummy=42)
+        inner = Inner.objects.create(holder=holder, dummy=42, readonly='')
+        response = self.client.get('/test_admin/admin/admin_inlines/holder/%i/'
+                                   % holder.id)
+        self.assertContains(response, '<label>Inner readonly label:</label>')
+
+
 class TestInlineMedia(TestCase):
     fixtures = ['admin-views-users.xml']
 
@@ -63,4 +73,4 @@ class TestInlineMedia(TestCase):
         change_url = '/test_admin/admin/admin_inlines/holder2/%i/' % holder.id
         response = self.client.get(change_url)
         self.assertContains(response, 'my_awesome_admin_scripts.js')
-        self.assertContains(response, 'my_awesome_inline_scripts.js')
\ No newline at end of file
+        self.assertContains(response, 'my_awesome_inline_scripts.js')