diff --git a/django/contrib/contenttypes/generic.py b/django/contrib/contenttypes/generic.py
index 0be1de6e63..adc245bb75 100644
--- a/django/contrib/contenttypes/generic.py
+++ b/django/contrib/contenttypes/generic.py
@@ -355,6 +355,7 @@ def generic_inlineformset_factory(model, form=ModelForm,
         raise Exception("fk_name '%s' is not a ForeignKey to ContentType" % ct_field)
     fk_field = opts.get_field(fk_field) # let the exception propagate
     if exclude is not None:
+        exclude = list(exclude)
         exclude.extend([ct_field.name, fk_field.name])
     else:
         exclude = [ct_field.name, fk_field.name]
diff --git a/tests/regressiontests/generic_inline_admin/tests.py b/tests/regressiontests/generic_inline_admin/tests.py
index e03cc1f2f4..57a9c701cb 100644
--- a/tests/regressiontests/generic_inline_admin/tests.py
+++ b/tests/regressiontests/generic_inline_admin/tests.py
@@ -2,6 +2,7 @@
 
 from django.test import TestCase
 from django.conf import settings
+from django.contrib.contenttypes.generic import generic_inlineformset_factory
 
 # local test models
 from models import Episode, Media
@@ -71,3 +72,8 @@ class GenericAdminViewTest(TestCase):
         }
         response = self.client.post('/generic_inline_admin/admin/generic_inline_admin/episode/1/', post_data)
         self.failUnlessEqual(response.status_code, 302) # redirect somewhere
+    
+    def testGenericInlineFormsetFactory(self):
+        # Regression test for #10522.
+        inline_formset = generic_inlineformset_factory(Media,
+            exclude=('url',))