diff --git a/src/pretix/settings.py b/src/pretix/settings.py
index a8153feab6..b8ce8aaf2f 100644
--- a/src/pretix/settings.py
+++ b/src/pretix/settings.py
@@ -367,7 +367,7 @@ except ImportError:
 
 
 if METRICS_ENABLED:
-    MIDDLEWARE.insert(MIDDLEWARE.index('pretix.multidomain.middlewares.MultiDomainMiddleware') + 1,
+    MIDDLEWARE.insert(MIDDLEWARE.index('pretix.multidomain.middlewares.CommonMiddleware') + 1,
                       'pretix.helpers.metrics.middleware.MetricsMiddleware')
 
 
diff --git a/src/tests/base/test_metrics.py b/src/tests/base/test_metrics.py
index 970414a1d2..e035db5268 100644
--- a/src/tests/base/test_metrics.py
+++ b/src/tests/base/test_metrics.py
@@ -189,3 +189,11 @@ def test_metrics_view(monkeypatch, client):
     # test metrics-view
     basic_auth = {"HTTP_AUTHORIZATION": base64.b64encode(bytes("foo:bar", "utf-8"))}
     assert "{} {}".format(fullname, counter_value) not in client.get("/metrics", headers=basic_auth)
+
+
+@pytest.mark.django_db
+@override_settings(HAS_REDIS=True, METRICS_USER="foo", METRICS_PASSPHRASE="bar")
+def test_do_not_break_append_slash(monkeypatch, client):
+    r = client.get('/control')
+    assert r.status_code == 301
+    assert r['Location'] == '/control/'
diff --git a/src/tests/multidomain/test_middlewares.py b/src/tests/multidomain/test_middlewares.py
index 321b28b527..a2afa0b5f2 100644
--- a/src/tests/multidomain/test_middlewares.py
+++ b/src/tests/multidomain/test_middlewares.py
@@ -27,6 +27,13 @@ def test_control_only_on_main_domain(env, client):
     assert r['Location'] == 'http://example.com/control/login'
 
 
+@pytest.mark.django_db
+def test_append_slash(env, client):
+    r = client.get('/control')
+    assert r.status_code == 301
+    assert r['Location'] == '/control/'
+
+
 @pytest.mark.django_db
 def test_unknown_domain(env, client):
     r = client.get('/control/login', HTTP_HOST='foobar')