diff --git a/analytical/tests/test_utils.py b/analytical/tests/test_utils.py
index d8dec09..3b1636a 100644
--- a/analytical/tests/test_utils.py
+++ b/analytical/tests/test_utils.py
@@ -1,16 +1,29 @@
 """
 Tests for the analytical.utils module.
 """
+import django
 
 from django.conf import settings
+from django.db import models
 from django.http import HttpRequest
 from django.template import Context
 from django.test.utils import override_settings
 
 from analytical.utils import (
-    get_domain, is_internal_ip, get_required_setting, AnalyticalException)
+    get_domain, get_identity, is_internal_ip, get_required_setting,
+    AnalyticalException)
 from analytical.tests.utils import TestCase
 
+try:
+    from unittest import skipIf
+except ImportError:  # Python 2.6 fallback
+    from unittest2 import skipIf
+
+try:
+    from django.contrib.auth.models import AbstractBaseUser
+except ImportError:  # Django < 1.5 fallback
+    AbstractBaseUser = models.Model
+
 
 class SettingDeletedTestCase(TestCase):
 
@@ -33,6 +46,18 @@ class SettingDeletedTestCase(TestCase):
                               get_required_setting, "USER_ID", "\d+", "invalid USER_ID")
 
 
+class MyUser(AbstractBaseUser):
+    identity = models.CharField()
+    USERNAME_FIELD = 'identity'
+
+
+class GetIdentityTestCase(TestCase):
+    @skipIf(django.VERSION < (1, 5,), 'Custom usernames not supported in Django < 1.5')
+    def test_custom_username_field(self):
+        get_id = get_identity(Context({}), user=MyUser(identity='fake_id'))
+        self.assertEqual(get_id, 'fake_id')
+
+
 @override_settings(ANALYTICAL_DOMAIN="example.org")
 class GetDomainTestCase(TestCase):
     def test_get_service_domain_from_context(self):
diff --git a/analytical/utils.py b/analytical/utils.py
index 6fb7b93..2c52478 100644
--- a/analytical/utils.py
+++ b/analytical/utils.py
@@ -76,7 +76,10 @@ def get_identity(context, prefix=None, identity_func=None, user=None):
                 if identity_func is not None:
                     return identity_func(user)
                 else:
-                    return user.username
+                    try:
+                        return user.get_username()
+                    except AttributeError:  # Django < 1.5 fallback
+                        return user.username
         except (KeyError, AttributeError):
             pass
     return None
diff --git a/tox.ini b/tox.ini
index 902d99d..713551a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,6 +18,7 @@ basepython =
 deps =
     coverage==3.7.1
     coveralls
+    py26: unittest2
     django14: Django>=1.4,<1.5
     django15: Django>=1.5,<1.6
     django16: Django>=1.6,<1.7