diff --git a/djrill/tests/test_mandrill_webhook.py b/djrill/tests/test_mandrill_webhook.py
index 1b3943c..d2969e4 100644
--- a/djrill/tests/test_mandrill_webhook.py
+++ b/djrill/tests/test_mandrill_webhook.py
@@ -67,7 +67,7 @@ class DjrillWebhookSignatureMixinTests(TestCase):
     def test_signature(self):
         signature = hmac.new(key=b(settings.DJRILL_WEBHOOK_SIGNATURE_KEY), msg = b(settings.DJRILL_WEBHOOK_URL+"mandrill_events[]"), digestmod=hashlib.sha1)
         hash_string = b64encode(signature.digest())
-        response = self.client.post('/webhook/?secret=abc123', data={"mandrill_events":"[]"}, **{"X-Mandrill-Signature" : hash_string})
+        response = self.client.post('/webhook/?secret=abc123', data={"mandrill_events":"[]"}, **{"HTTP_X_MANDRILL_SIGNATURE" : hash_string})
         self.assertEqual(response.status_code, 200)
 
     def tearDown(self):
diff --git a/djrill/views.py b/djrill/views.py
index 04f132d..eb60320 100644
--- a/djrill/views.py
+++ b/djrill/views.py
@@ -118,7 +118,7 @@ class DjrillWebhookSignatureMixin(object):
                 raise ImproperlyConfigured(
                     "You have set DJRILL_WEBHOOK_SIGNATURE_KEY, but haven't set DJRILL_WEBHOOK_URL in the settings file.")
 
-            signature = request.META.get("X-Mandrill-Signature", None)
+            signature = request.META.get("HTTP_X_MANDRILL_SIGNATURE", None)
             if not signature:
                 return HttpResponse(status=403, content="X-Mandrill-Signature not set")