diff --git a/tos/middleware.py b/tos/middleware.py
index d740db5..2233fbe 100644
--- a/tos/middleware.py
+++ b/tos/middleware.py
@@ -25,7 +25,7 @@ class UserAgreementMiddleware(MiddlewareMixin):
             return None
 
         # Ignore ajax requests
-        if request.is_ajax():
+        if request.META.get('HTTP_X_REQUESTED_WITH') == 'XMLHttpRequest':
             return None
 
         # Don't redirect users when they're trying to get to the confirm page
diff --git a/tos/tests/test_middleware.py b/tos/tests/test_middleware.py
index 5dffd06..bb64376 100644
--- a/tos/tests/test_middleware.py
+++ b/tos/tests/test_middleware.py
@@ -111,9 +111,6 @@ class TestMiddleware(TestCase):
 
 
 @modify_settings(
-    MIDDLEWARE_CLASSES={
-        'append': 'tos.middleware.UserAgreementMiddleware',
-    },
     MIDDLEWARE={
         'append': 'tos.middleware.UserAgreementMiddleware',
     },
@@ -142,6 +139,9 @@ class BumpCoverage(TestCase):
     def test_ajax_request(self):
         class Request(object):
             method = 'GET'
+            META = {
+                'HTTP_X_REQUESTED_WITH': 'XMLHttpRequest'
+            }
 
             def is_ajax(self):
                 return True